Kevindamoe

raymond g-

depends on the actual wheel's cross section. the bolt should pass through the
wheel and extend the same distance as the stock bolts on stock wheels. no
more, no less. so if you have the old rims, insert the stock bolts and measure.

with the new wheels, buy bolts which have matching thread, shank diameter,
and ball seat...but be sure that the shank length matches the exposed length
which would extend into the hub

every wheel design may have their own cross sectional thickness to cause
the bolt length to vary

1bad540

chances are u need a 28mm bolt. I did on my last 2 s550's that i changed the wheels.

superpop

Ray G is right. Measure the old bolt and length of bolt coming out of the back of the wheel. Too short is bad and too long is bad. Has to be right, and make sure you get the right shank type to match the wheel bore.