Quote:
Originally Posted by M2joey
You will do one of two things with a square setup. With a narrow tire / wheel, you will induce a good bit more oversteer. In short, the rear will steer much easier and faster. You will also move more grip to the front of the vehicle. If you go with a wider tire / wheel for a square setup, you will induce understeer. It will take more effort to turn the vehicle.
Most experienced track / HDPE drivers will move to a square setup to improve steering response, move grip to the front and reduce tire expense. However, if you are looking for the ultimate in all-around grip, staggered is the best.
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This is in theory correct. But it doesn't stand for X5, at least the non M version. Stock 19 and 20 setup are square with. 19" setup even use 265 width, I don't believe over steering has been the typical behavior even at that width.
Also, typical BMW suspension setup, all are very under steering. This is even try for M cars. Using stagger will just promote more understeer. Your HPDE observation is same as mine, most will change to square setup on track to get a more balance handling. Most will even go for a stiffer rear anti roll bar to reduce understeering even more. HPDE instructors always says, "all germans are push from factory"