Tell me about alighnment issues

[flyinlow]

What Makes tires wearout fast? I can see how under/over inflation, out of balance,bad shocks, excessive toe and of course spirited driving would do it. However ,does adding positive caster or a slight negative camber course problems?  With wider,lower aspect ratio radial tires should you run less toe in?

[HPP]

Wear is generated by surface friction. If all the angles are set within a tolerable range, the wear is even. If an angle is out anywhere, the wear accellerates in that range. Softer compounds wear faster too but ther ehas to be some tradeoff between rock hard and too soft for gri and longevity.

Caster typically does not accellerate wear any faster than the tire rolling over a surface. Small amounts (1* or less) of negative (or positive for that matter)camber does not accellerate wear in radials. In a bias ply it will wear faster because the construction of the tire does not tolerate the additional angle very well. Toe requirements are the typically result of the tire's surface drag against all the joints in the steering system. The tighter or fewer of these you have, the less toe required, but radials also create a slightly different drag that may require slightly less toe as well. Again, because the carcass construction is different, it creates a different dynamic so in some cases you can use less toe.