Toe
| /--\ = negative toe/ Toe In (view from Top of car) \--/ = positive toe/ Toe Out (view from Top of car) |
Negative toe on the rear wheels will stop oversteer because the wheels are at this angle /--\ (looking from the top of the car). That's great for corners but reduces acceleration on the exits and straights because there isn't as much tire contact to the ground as a zero toe like this |--| .
So as you can see there is a compromise.
Quick physics lesson. Looking at the diagram above ... when going around a left hand corner the weight of the car leans to the right two tires. The negative front toe makes the car turn sharper left, while the positive toe rear swings the rear further out to the right, making the car point left into the left hand corner.
The compromise of fixing understeering or oversteering using toe adjustments is that tire wear will increase. There is always a compromise in every adjustment, we don't live in a perfect world. Engineers always try to reduce oversteer and understeer using adjustments to springs, shocks, stabilizers and wings first. Only think about toe adjustments as a last resort, since any toe value added will increase tire wear.
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