old captain slow Posted July 12, 2006 Share Posted July 12, 2006 Erect a pair of wires parallel to each other on either side of the car at about the same height as the centre of the wheel rim. It's not critical to have the car exactly straight between the wires but the steering should be set straight ahead. Measure the distance from each wire to the front of the wheel rim on either side and then measure the distance to the rear of the wheel rim on either side. The toe angle = half x arctan (difference of sum of front pair of measurements and sum of rear pair of measurements / wheel rim diameter between measurement points) Comes out as about 4mm for 20' toe (in or out). C7 CDW Edited by - David W on 12 Jul 2006 13:10:59 Link to comment Share on other sites More sharing options...
DohNut Posted July 12, 2006 Share Posted July 12, 2006 Maths looks correct if 13inch wheel is 330mm diameter 1mm difference is Tan-1 (1/330) = 0.17deg or (0.17*60) = 10.4 minutes for one wheel. Link to comment Share on other sites More sharing options...
old captain slow Posted July 12, 2006 Author Share Posted July 12, 2006 Ta DN but ... Is the method correct? Where is Norman when you need him. C7 CDW Link to comment Share on other sites More sharing options...
Paul Deslandes Posted July 12, 2006 Share Posted July 12, 2006 David Toe is normally expressed as the angle between both wheels rather than half of it which is what your calculation would give. i.e. assuming toe in, it would be the angle at the intersection of the extension of the two horizontal wheel circumferences at a point a long way in front of the car, rather than the angle of each wheel in relation to the centre line of the car. You sometimes see toe expressed as the difference in the distances between the fronts and rears of the wheel rims in mm. Conversely, camber is the off-vertical angle of each individual wheel. Otherwise your method looks good. Also, as the angles are very small (<10deg) the ratio is the same as the angle in radians so you can multiply the division result by 180/Pi (57.3) for the angle in degrees. Have fun setting up your parallel lines! Paul Link to comment Share on other sites More sharing options...
old captain slow Posted July 13, 2006 Author Share Posted July 13, 2006 Ah right ok I see ta much. C7 CDW Link to comment Share on other sites More sharing options...
susser Posted July 13, 2006 Share Posted July 13, 2006 So why don't we have the wheels pointing in the direction they are going. 🤔 I've got a few ideas but I'm keeping them to myself for now. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now