| Re: Why not fix one ton scrub radius with wheel offset? [message #361947 is a reply to message #361905] |
Sat, 23 January 2021 08:58   |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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I’m not going to look it up (you can do that) but guessing that the steering axis is the intersection of the imaginary line through ball joints to where that intersects the tread width at the road. A passive measurement. The scrub radius is the distance from that imaginary point to the arc the tire creates when turning lock to lock. For example on a stock coach, adding spacers would increase that arc length. Instead of pivoting about the steering axis, you take on an open “c” shaped pattern. Therefore when hitting a pothole squarely instead of just having suspension deflection the tire wants to also turn outboard, causing an unwanted steering effect.
John Lebetski
Woodstock, IL
77 Eleganza II
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