As crossweights move away from 50 percent, the car's handling becomes unpredictable. It doesn't respond the same when turning left or right, as in the original example. For the average street handling application, road-course, or slalom event, you want no wedge, or 50 percent crossweight (plus or minus 0.5 percent). Once again, on nose-heavy, transverse-engine FWD cars, getting to 50 percent may be difficult. These cars may be 3-5 percent off on the crossweight. (That's why there's so much interest in coilovers among sport-compact guys.) It's a different story on cars that turn primarily in one direction--like left-turning oval-trackers, which usually have "stagger" (the RR tire has a larger circumference than the LR tire). Stagger usually loosens handling in left turns, so more crossweight is used to tighten it up.

Due to torque-twist on acceleration, a RWD drag car tends to lift the left-front and right-rear tires. It is one case where the car may benefit from reverse-wedge (under 50 percent crossweight). Likewise, occasionally a road-racer may want to deviate from the "50/50 rule." For example, Willow Springs, a southern California road-course, has a preponderance of very long, fast righthand turns; some drivers intentionally dial in reverse-wedge to maximize performance on this course.