Not sure if it is in the right section but,

i m seeing some cossie saphs as i want to buy one.

A friend of mine was telling me that rwd models of the saph lack traction on low gears due to the rear wheels loosing geometry under heavy acceleration also he said that this will increase tire wear. I noticed saphs going really low from the back when accelerating but he was saying that the wheels get angled and the tire's surface doesn't all touch the ground and that s why they loose traction and wear tires faster.

Is this true and is there a fix for it? sorry for my bad English