People attribute the inner wear of the rear tear to camber. Most of the time is because they believe that toe wear is on the outside of the tire because that's what happens to the front tire.
I suspect it is because historically (particularly across US cars with solid rear axles) toe is a geometry of the front axle only.
For rear tire toe is measure the "opposite way".
Positive toe always represents a convergence of the tires away from the vehicle: this means that in the rear tires when the car is moving forward the outer side of the tire is trailing the inner side. That's why toe (as in positive toe which is what gives you directional stability) in the rear side results in wear in the inside of the tire.
I'll repeat it: it is not camber that wear the rear tires, it is toe. And toe is much more disruptive on the tire than any camber because it subjects the tire to a different type of friction. Camber wear is still comes form rolling friction; camber results in higher pressure in the inside compared to the outside so the same rolling friction results in greater inner wear. However this is marginal.
Toe on the other hand wear the tire at a much higher rate because the tire is effectively dragging along, it is rubbing against the pavement, and subjects the tire to sliding friction rather than simply rolling friction.
12-22-2015, 03:49 PM
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