Care Of Special Wheels
If you have invested money in magnesium, aluminum alloy or sport wheels, special precautions should be taken to make sure your investment is not wasted and that your special wheels look good for the life of the vehicle.
Special wheels are easily damaged and/or scratched. Occasionally check the rims for cracking, impact damage or air leaks. If any of these are found, replace the wheel. But in order to prevent this type of damage and the costly replacement of a special wheel, observe the following precautions:
Wheel Lug Studs/Bolts
Removal & Installation
The wheels are mounted onto the vehicle with wheel bolts. The wheel bolts have changed slightly from the type used on earlier models and can be recognized by the dished heads and slightly lighter weight. The wheel bolts should always be installed as a matched set, and the threads lubricated with a petroleum based 30 weight engine oil or an anti-seizing compound and tightened in a crisscross pattern.
Although not sold by BMW, there are aftermarket suppliers of wheel studs that have been used for off road closed course use. Some enthusiast prefer using these for conditions that warrant frequent removal of wheels and tires.