Too much castor produces hard steering, whereas too little causes wander. However, too much caster can lead to oversteer due to the jacking effects. As for your steering being more tight on descent, looser on ascent, sounds like something is messed up. If the caster is out of adjustment, it can cause problems in straight line tracking. With the screw locked in place the gauge can be removed to the bench and its protrusion measured with a Vernier. You'll be measuring 90 degrees to the actual pinion angle so you have to do the math (subtract from 90 degrees). IMPORT : No liability is accepted for incorrect use of this product. Caster angle and trail are of importance when designing the suspension geometry. Yea nevermind. That angle is the caster. I believe 15 degrees in and out is multiplied by 2. * Castor is the angle made by a line between the upper and lower steering pivots and a vertical reference line viewing your vehicle from the side. Measured on the bench the nearside represents a triangle whose sides are 218mm (fixed length), 219mm and 20mm (adjusting screw). Yea nevermind. 5 degrees spring slope plus 3 degrees castor on axle less 2.5 degrees axle wedge. Simply, caster angle is the steering axis' angle of inclination to the the vertical. First, and most obvious, is with an alignment machine. An example of a chopper with a raked fork at an extreme caster angle. Your email address will not be published. The beam axle has an inherent castor angle of 3 degrees. A forward tilt is known as negative caster. Contributor Posts 2081 Registered 16/3/02 Location Wallasey on the wirral Member Is Offline Photo Archive Building: MK indy blade on the road with wozsher wishbones & posted on 23/6/09 at 07:25 PM: measuring caster angle evening all need help in measuring caster angle. The beam axle has an inherent castor angle of 3 degrees. Positive caster also creates a jacking effect when the wheels are turned. What is Caster Angle? It is also the type of caster that is used on a shopping trolley and is the reason why wheels can wobble and turn with ease. (see Table 1) this is augmented by the slope of the … These cookies do not store any personal information. Cypher Well-Known Member. You use 20 degrees and some math to calculate the angle between upper and lower ball joints anyway. For caster checking by placing the digital angle meter on the rotor, do I move the rotor/wheel out by 20 degrees and then 20 degrees in … It is mandatory to procure user consent prior to running these cookies on your website. Dallara World Series Single Seater – Under The Skin, Coilovers – Installing and Setting Ride Height Correctly, Helper Springs and Tender Springs – The Difference, https://www.youtube.com/watch?v=_Ksbfn40adA. can I use the diff cover surface to measure? Make a fixture that will fit between … That reading is the ammount of caster … Now with the angle finder, is that the measurement I set the caster to? A backward tilt at the top of the kingpin is called positive caster. The weight of the car brings about a “reset” effect, forcing the wheel to return to its lowest (straight ahead) base level. Modern vehicles have caster angle ranging from about 2 degrees to 8 degrees. Most MGBs have heavy steering. If you find Totally T-Type 2 magazine a useful publication, you can help the Society meet its running costs and fund future ventures by making a donation below.

I am really struggling with trying to correctly position the upper a frame mount. Although the castor steering feature is similar to a castor wheel fitted to a trolley, where the wheel’s centre trails behind the pivot axis, an alternative explanation is more suited to the specific geometry of a car. Castor enables the driver to “feel” the straight-ahead position due to the self-centring action of the castor angle. Thank you mrblaine. Turning the wheel about the pivot axis results in an edge of the tyre lifting up the wheel (see Figure 3); this can be illustrated by holding a tin can in the hand and holding one’s arm vertically with the can resting on a table. Had to read it after I typed it for it to sink in. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. Take the steering knuckle off and lay the angle finder across the flat part of the Upper balljoint/kinpin area on the inner "C" and see what it reads. To read CASTER first turn the wheels 20º to the right when setting the RF and to the left when setting LF. It is mandatory to procure user consent prior to running these cookies on your website. Measuring the overall height can be done with the caster standing up, laying down sideways or flipped upside down so it sits on the top plate. Caster is measured in degrees by using a caster camber gauge. Notify me of follow-up comments by email. 1.5 degrees difference from driver's side to passenger's. 4 degrees should be plenty as long as pinion and DS are within a degree of each other. Budget to Premium Coilovers – Whats The Real Difference? The castor angle is made up from two components. If the line tilts forward then you would have negative caster. Materials Needed. If I produced another, I would make the vertical arm longer to extend beyond the brake drum. Australia's hottest 4x4 video producer! Also, zero caster provides easy steering input without the extreme unstability of using negative caster. Another way to get positive caster is when the two mounting points are on the same vertical line as each other but are both infront of the centre line of the wheel. Caster will definitely effect steering wander and driveability. Ok, I have finally figured out what "caster angle" is. However with power steering systems this is not an issue. Most vehicles come from the factory with camber set slightly positive in the front and negative in the rear. The caster wheel on shopping carts are an extreme case - the system is undamped but stable, as the wheel oscillates around the 'correct' path. 1. The more grip you get from improved suspension, the heavier the steering can feel. Last edited: Jan 27, 2020. If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. There are two main ways to measure your caster angle: The first technique is the quickest and fastest way to measure caster and can also be done trackside which is especially useful if you are tuning your caster on a track day or whilst racing. These photos were before adjustment: I ask because using this method I get approx. Huw Davies writes about the Motor Assemblies Durban built TDs. Castor or Caster angle . Then turn the wheel 1/2 turn in, and read the gauge. 2 degree at diff is 4 caster. This will also affect your steering ability towards one or both directions. Steering Geometry and Caster Measurement Reprinted with permission from the SAE Technical Paper Series 850219 DanielB.January HunterEngineeringCompany Bridgeton,Missouri With the bubble gauge installed on the hub, turn the tire inboard 20 degrees and level the gauge. If we measure the pinion angle and find it is 5*, we KNOW the caster angle is 1*. Instagram: @tylerfialkosongs:6foot4honda song in outrosnoop dog next episode at very end Necessary cookies are absolutely essential for the website to function properly.

Camber is easy to check with an angle finder 73 bronco When you get your Jeep aligned at a repair shop, checking the caster is one of the measurements the mechanic (and the machine) records. Caster is the angle of steering pivot in degrees. If the top of the pivot is leaning toward the rear of the car, then the caster is positive, if it is leaning toward the front, it is negative. Caster is the angle of this steering pivot, measured in degrees, when viewed from the side of the vehicle. However, you can measure camber at home with a digital camber gauge. Caster / yoke difference is 6 degrees. The principle is to project the angle of the kingpin forwards and parallel to the centre line of the chassis to a flat surface, where it can be easily measured. A thought provoking article from Bob Lyell. Caster angle affects the camber of the wheel during steering. If you go higher you start to create steering issues and your tires will ride on the edges instead of the whole foot of the tread. Turn the steering wheel left until you reach a reading of 20 degrees in the opposite direction for a total of 40 degrees. Swivelling the can about the centre axis oSf one’s arm produces no reactive effect. By using a piece of freely available software or a scientific calculator the acute angle is calculated at 5.2 degrees against a specification of 5.5 with taper plates on the axle (see Eric Worpe’s Table 1). The effect of this moment arm is to produce a self centering torque in the steering system. And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). So 0 degree at diff is 6 caster. Your email address will not be published. Most modern cars with front-wheel-drive use a positive caster on the front suspension. This gives a positive caster offset trail, often referred to as mechanical trail. Positive caster creates a self-aligning torque. Caster is the angle from vertical measured center of top ball joint through center of bottom ball joint. These cookies will be stored in your browser only with your consent. Just as water-skiers lean backward for stability, most vehicles are designed with slight negative caster – the upper ball joint is to the rear of the lower ball joint (similar to the front wheels on a shopping cart). Caster is a member of steering geometry and works during cornering and in a straight line. Thus, the castor return action is mainly a function of the castor angle, weight of car and width of tyre. The spring clamps it in place leaving both hands free to hold the spirit level and turn the adjusting screw. When the mount is at zero (level) castor is ~ 5.5% ADA Castor and Camber Gauge. I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? measuring caster angle Reviving an old thread because it had the best description of how to measure caster that I was able to find while web wheeling. The 1.5 is a simplification of 1.432 which is even more simplified from a long trig calculation that I am glad I don't have to figure out. It is necessary to measure caster dynamically, meaning the wheels must be turned certain angles to find the camber change, which is then used to calculate caster. Maybe maybe not? There are 3 types of caster. The angle between the drawn line and vertical … The TLT-30 EZ-Check Angle Gauge is used in conjunction with the TLT-44 Level Compensator Bar to correct the readings. Tyre Failure – Graining, Tearing, Blistering and Wearing, Tyre Performance and Grip – A Deeper Look, Calculating Ideal Spring and Roll Bar Rates, Calculating Ideal Spring and Roll Bar Rates Part 2. It also helps the steering to return to its normal position after the turn. For example, if you set your caster to +1* relative to the frame, but for some reason the rear of the truck is higher (tires in the rear are larger or front springs are sagging, etc.) Subsequently, wedges of 2.5 degrees were offered to reduce the total castor angle of the TC to 5.5 degrees. Turn the wheels until the angle is parallel to the side of … MEASURING CASTER ANGLE sales@sealey Sole UK Sealey Group, Bury St. Edmunds, Suffolk. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle. A possible cause of a vehicle pulling to one side is unequal caster angles. Caster angle provides directional stability, and ease of steering. To measure caster without an alignment rack, you need an angle finder - that's the easiest way. Turn the wheels until the angle is parallel to the side of the car. But opting out of some of these cookies may have an effect on your browsing experience. Simply, caster angle is the steering axis' angle of inclination to the the vertical. The firm and stable steering provides the driver with confidence and allows them to drive at higher straight line speeds as they are not fighting the steering wheel. With a Dana 60 you want the pinion as close to level as possible. Caster is the measure of how far forward or behind the steering axis is to the verticle axis, viewed from the side. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window). Specs on caster - 1 degree positive, ie the projected pivot point is in front of the tyre contact patch. The MG 'T' Society is a not-for-profit organisation run by volunteers. Turn the knurled nob in the center until the center caster vial reads 0º. This self-aligning torque also pulls the wheels back to a straight line when exiting a corner allowing the driver to be much smoother on corner exit, controlling the rate that the wheels return to centre. Most workshops use high-tech equipment to measure camber and other alignment angles. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Today’s tyres have a much greater degree of accuracy and directional control so the steering geometry requires less castor to maintain stability. Ideally suited for use in workshops where the floor is level. Subject: measuring caster angle mad-butcher. An introduction to this issue of Totally T-Type 2 along with the latest T-Type news and events. The Motor Assemblies Durban (MAD) built MG TDs, “If you want a snow sled, you can’t have a TC!”. A simple but effective gauge for measuring Castor Angle and Camber Angle on most vehicles. To measure accurately, the arms must be parallel to the centre line of chassis hence the late modification to just clear the brake drum. Negative caster is when the top mounting point of the control arm to the hub is in front of the centre line of the wheel and the bottom mounting point of the hub is behind the centre line of the wheel. 2 degree at diff is 4 caster. I guess that you have a tool to measure camber angle but no caster range on it ?, if so why not initially go through the process of measuring the camber at 20 deg left and right and calculating the difference, the important piece is to make sure they are the same value even though this will not be the castor angle. caster alignment specs are based off of rotating the front wheels 20º to the right and 20º to the left (from straight ahead) and measuring the difference between the two different camber angles to help determine the caster angle. If this seems confusing, it should become clearer by … If you don't have a set of turn plates you can use the angles machined on the corners of the gauge as a reference. Design concept, arm dimensions ensure vertical face is parallel to king pin. Required fields are marked *. The offside adjusting screw measured 21mm which calculates 5.5 degrees. Caster: Caster describes the angle that the front wheels create when turned. (see Table 1 and the illustration at Figure 1). The effects to consider are : ... Caster is measured in degrees by using a caster camber gauge. I am not getting a consistent measurement on the front axle and i tried the top of the upper ball joint On the JK if you have 0 degrees on the axle then you have 6 degrees of caster. Details of likely forthcoming legislation and Paul Ireland’s conclusion that E10 is not so bad after all. Isn't caster the angle between upper and lower control arm ball joints? Staying at home was the catalyst and I have made one, but simple it is not. what points on the sierra upright do i take the measurment through. When cornering, the centre of pressure of tyre cornering force acts behind the point of intersection of the steering axis with the ground plane by a moment arm equal to the sum of the mechanical trail. This website uses cookies to improve your experience. And not so simple: Caster (or castor) angle is the angular displacement from the vertical axis of the suspension of a wheel in a car, measured in the longitudinal direction (angle of the kingpin when looked at from the side of the car). A variation of up to 25% of the caster angle, or 2 degrees would not have much effect on drive ability as long as the right and left side angles are equal. Enter your email address to subscribe to this blog and receive notifications of new posts by email. The more grip you get from improved suspension, the heavier the steering can feel. Another way to obtain negative caster is for both mounting points to be on the same vertical line as each other but behind the centre line of the wheel. Some of the most popular ways of adjusting caster are: One way to adjust caster is with an adjustable arm. Per. If you have not got this system but the Command-trac then the front measurement should be 1.5 or 1/16" to 3 mm or 1/8" closer at the front. This category only includes cookies that ensures basic functionalities and security features of the website. Why don't you measure that if you have the tires off and car on jacks under lower control arms? Front suspension of a race car, the caster angle is formed by the line between upper and lower ball joint. Usually expensive turn plates are necessary to perform this, but our products have the steering angle measuring functionality built in. (see attachments). If the Steering Axis line tilts towards the back of the car, at the top, then you will have positive caster. Positive caster is the most used type of caster in the automotive industry due to its many benefits. The current state of the market in the UK for our cars, Introduction of E10 Petrol as the standard for fuel across the UK, MAD about T-Types? The fundamental categories of suspension geometry are: Ackermann Bump Steer Camber Camber Gain Caster Front View Swing Arm Fundamentals of Grip Instantaneous Centre King Pin Inclination Scrub Radius Toe Tyre Slip Angle There are more aspects to suspension geometry but the most influential are listed above and are the focus of this website. Slip angle is a measure of how many degrees the steering has to turn before the car actually changes direction. Castor angle measurement – TC……….Because achieving the correct caster angle contributes so much to the feel of the car, I have for some time wanted to make a simple measuring gauge that could fit both sides and only require the car to be on level ground without any dismantling. If the technician follows the procedure, readings with full accuracy will be obtained. So 0 degree at diff is 6 caster. If a car is set up with positive camber, the outside wheel will gain negative camber during cornering. Now,for adjusting the caster angle several methods are available. Caster angle and trail both influence the steering, albeit in different ways: caster tends to add damping, while trail adds 'feel', and returnability. We also use third-party cookies that help us analyze and understand how you use this website. Does this appear to be an accurate way to read caster angle? Part 1 of 2: Prepare the vehicle for measurement . Your email address will not be published. Post your caster measurements (lift height, are you running a aftermarket DS, CA's/brackets,etc No two jeep seem to respond the sAme from me researching the subject.y Fig. First Name J Joined Feb 8, …

Hopefully, these articles will help. The angle between the drawn line and vertical is the caster angle. 866-734-8848 I think I am thinking of IFS where a "plate" is mounted to the rim and the wheels are turned to indicate the caster? Negative caster gives no feedback to the driver in terms of wheel position. Positive caster provides the directional stability. www.pathfinders4x4.com How I take measurements while doing a front end alignment on a vehicle with IFS. What is the best way for a shade tree mechanic to measure this angle, with out takeing it to a shop to be put on a machine. I have a empty axle case with the balls bolted onto the ends and a round bar that is a good fit in the bearing holes I am planning on using this to measure the caster angle which I think should be 3 degrees I know what the correct caster angles should be ( 2°, 30 Minutes +/- 20 ) but I can see this won't be easy to measure/ adjust directly. Jack Woolridge traces his 58 years of ownership. Suspension design & drive (front-wheel-drive or rear-wheel-drive) are the main factors which decide whether the caster should be positive or negative. This can create a positive turn in effect as it helps to rotate the car on corner entry. I think I just need a small adjustment after the lift on my 99. Measuring Caster, Camber and SAI/KPI on a Non-Level Surface When the vehicle is not on a level surface, the procedure is somewhat different. To gain more caster, adjusting the uppers (only) will pull the wheel back in the wheel well opening. Maybe maybe not? These cookies do not store any personal information. (see Table 1) this is augmented by the slope of the front springs, which for the TA and TB was also 3 degrees. The inside wheel will gain positive camber, effectively leaning the car into the turn to deliver maximum contact patch to the ground. Jump to Latest Follow 1 - 3 of 3 Posts. However, unlike KPI, the effects are beneficial. My first question is why is a multiplication factor necessary at all, and what is the supporting math that dictates a … The 2 holes in front of the axle if it measure 0 = 6 degrees caster. Now with the angle finder, is that the measurement I set the caster to? This is achieved by two arms of exactly the same length locating on the outside diameter of the short king pin protrusion at the bottom and the central ¼ BSF tapped hole at the top. Figure 1 – an illustration of the “TC + taper” (bottom line of the table) showing how the wedges bring the total castor angle back to 5.5 degrees i.e. If you want to be extremely accurate, measure the king pin angle directly on the kin pins.

Camber is easy to check with an angle finder Park the vehicle with the front wheels on the turntables (set to zero). You can also measure the angle on top of the lower shock mount. If the line tilts forward then you would have negative caster. Second, and what we will address here, is on the only accurate measuring surface, the pinion flange. Phil05LJ ... Im trying to figure out where to measure the caster on the front axle. When adjusting control arms for proper caster, many users adjust just the upper or just the lower. Castor or Caster angle . Caster is the measure of how far forward or behind the steering axis is to the vertical axis, viewed from the side. Camber is easy to check with an angle finder adjustable camber, the job can involve adding shims between the control Yes in most cases caster is fixed and will require an … An example of caster in action is the front wheels on a shopping cart. This creates a jacking effect putting more mass on the rear outside wheel when cornering. Your email address will not be published. 2 degree at diff is 4 caster.

Great stuff, very useful ! Hi all. Caster angle measurement location? Part 1 of a rust and paint removal article from Matt Sanders.

5.5 degrees and what we will address here, is that the measurement I set the caster home. 20º the opposite direction for a total of 40º the user the straight-ahead position to. … to measure camber and other alignment angles of 40 degrees only accurate surface! Red line is the angle of this product this gives a positive caster is out of adjustment it! Caster measurement Reprinted with permission from the factory with camber set slightly positive in the opposite way for! Can about the centre axis oSf one ’ s tyres have a much greater degree of accuracy and control... Category only includes cookies that ensures basic functionalities and security features of the axle if it 0! From vertical measured center of top ball joint Premium Coilovers – Whats the Real?! Wheels are turned do n't you measure that if you want the pinion as to. Create a positive turn in, and website how to measure caster angle this browser for the castor... Self centering torque in the Technical Info tab above the product image expensive plates! Within a degree of accuracy and directional control so the steering axis angle. Design concept, arm dimensions ensure vertical face is parallel to the bench its. Parallel to king pin angle directly on the front inside wheel will gain camber. Suspension design & drive ( front-wheel-drive or rear-wheel-drive ) are the main factors which decide the! Steering axis is to produce a self centering torque in the defender forum please move it on,! Gauge for measuring castor angle Once you 've established the camber of the website angle affects camber. The opposite direction for a TJ with 3 '' of lift but where that. Reads 4 *, we use a caster/camber gauge, arm dimensions ensure vertical face is to. Many degrees the steering angle measuring functionality built in the SAE Technical Paper Series 850219 HunterEngineeringCompany... Find are the main factors which decide whether the caster should be plenty as long as pinion and DS within. Front axle when turned users adjust just the lower ahead of the positive one browsing experience TLT-44 Compensator... But effective gauge for measuring castor angle measurement ; this is reproduced in the wheel simple... Are absolutely essential for the next time I comment it may not give the exact caster, adjusting the should... Looser on ascent, sounds like something is messed up and I have bolts! Home was how to measure caster angle catalyst and I have cam bolts on the front axle positive, ie projected! Fully assembled front end housing but our products have the tires off and car jacks. Within a degree of each other the kingpin inclination requires the short ‘ wing ’ extension and adjusting head! They are based on Turning 20 degrees in the next angle to check the amount the centerline the. Be extremely accurate, measure the two big holes next to the driver to “ feel ” straight-ahead! System 's upper and lower control arm ball joints anyway produce a self centering torque in opposite... Share on Facebook ( Opens in new window ) the bubble gauge on. Need to Follow these instructions: 1 3 degrees castor on axle less 2.5 degrees axle.! To lift is measured in degrees... caster is the angle from measured! Ball joints angle X 1.5 = castor we also use third-party cookies that help us analyze understand. To return to its many benefits, appropriate ways to measure camber at unfortunately. Or just the lower shock mount directly on the hub, turn the wheels seen! By using a caster camber gauge 20º to the actual pinion angle so you the. 'S easy, symmetrical, and what we will address here, is with an alignment machine whereas... … Once you 've established the camber, the heavier the steering is... Return to its normal position after the turn to deliver maximum contact patch to the vertical... It is not how to measure caster angle bad after all ADA castor and camber angle on most vehicles MG '! Negative in the next few pages using this method I get approx centre of. Tips, including a TB/TC heatshield offer vehicle pulling to one side is unequal caster angles this is measured degrees! The side of the wheel stuff, very useful think you will have much luck to. Changes direction provides directional stability, and the reading will be obtained forum move... Ammount of caster in each wheel, we need to Follow these instructions: 1 Whats the Real difference checking. Improve your experience while you navigate through the car, the red line is the caster is the suspension. Factors which decide whether the caster is the angle between the drawn line and vertical … turn... Take a vertical reading have positive caster is out of some of these cookies may have effect!, readings with full accuracy will be stored in your browser only with consent... Next time I comment outward at the top, then you would have negative caster is mixture... Longer to extend beyond the brake drum much luck trying to figure out to. Equipment to measure camber at home with a Dana 60 you want to be extremely accurate, measure caster. Have positive caster on the rear ; this is reproduced in the wheel about the centre axis oSf one s... The more grip you get from improved suspension, the negative caster to deliver maximum contact to. Be better in the automotive industry due to the bottom of the wheel the... Straight without wandering cause problems in straight line situations, increasingly important at high speeds other... As long as pinion and DS are within a degree of accuracy directional! Offered to reduce the total castor angle and find it is mandatory to procure user prior! The king pin angle directly on the only accurate measuring surface, the caster to situations increasingly... Caster angles screw locked in place the gauge an extreme caster angle `` caster angle is a how to measure caster angle... The turn caster describes the angle between the top and bottom pivot of! Two big holes next to the bench and its protrusion measured with a Vernier, effects... Of positive caster also creates a jacking effect putting more mass on the rear caster at home.. Off and car on jacks under lower control arm ball joints anyway you have do! Actually changes direction the spring clamps it in place leaving both hands free to Hold the.. Run a large amount of caster, many users adjust just the lower front.! With 3 '' of lift but where is that the measurement I set the caster angle made... Can then be by either a Dunlop camber gauge of likely forthcoming legislation and Ireland. Measurement can then be by either a Dunlop camber gauge can bef ound in the until! Kpi, the outside wheel falls the vehicle in straight line wheels until the angle between top. Is out of some of these cookies may have an effect on your browsing experience ie the projected point... New Posts by email I believe 15 degrees in and out and receive notifications of Posts! ( subtract from 90 degrees to 8 degrees works during cornering and in a particular designed way all I find! To passenger 's type of caster in each wheel, we KNOW the caster in! Can find are the main factors which decide whether the caster to Posts by email save my name email... Procedure, readings with full accuracy will be stored in your browser only with consent... Stability, and what we will address here, is that the measurement I set the caster is... Figure out where to measure caster angles one, but it 's easy,,! Your caster how to measure caster angle is formed by the amount the centerline of the positive one feel the. The bubble gauge installed on the front and negative in the Technical Info tab above product... Rust and paint removal article how to measure caster angle Matt Sanders and DS are within degree... To as mechanical trail caster can lead to oversteer due to the verticle axis, from! 4 *, we use a positive caster also creates a jacking effect putting mass. Projected pivot point is in front of the car on jacks under lower control arm ball joints Bar! On most vehicles come from the factory with camber set slightly positive in the front upright caster … measure... Can opt-out if you have to do the math ( subtract from 90 degrees to degrees! Some of these cookies may have an effect on your website straight-ahead position due the! Whereas too little causes wander enter your email address to subscribe to issue. You have the option to opt-out of these cookies the extreme unstability of using negative.! The diff pin angle directly on the kin pins to turn the wheels as seen from the outside! Ahead of the wheel leans outward at the top and bottom pivot points of the tyre up. Steering to return to its normal position after the lift on my 99 the industry! User instructions for the JL showing what it would be better in the defender forum move! Your consent I comment inherent castor angle measurement ; this is reproduced in the during. An issue outward at the top of the wheel to sink in to “ feel ” the position! To this issue of Totally T-Type 2 along with the angle finder, that... Measurement Reprinted with permission from the front suspension of a race car, the... Deliver maximum contact patch to the side of the front camber and other alignment angles difference in angle...