KPcompetition

Got a great deal on a set so I went for it! I ordered some custom hubcentric 15mm spacers but some really old posts also said I need new wheel studs. But then others said it will be fine. Not sure what to think. If anyone can clarify I wanna get these on asap!

Naugamanator

This simply comes down to whether your wheel bolts stick out the back of your new wheels + spacers at the same length as your old wheels. If they are too short, then you will need new longer bolts.

FutureAMGxx

You are supposed to have 5 full turns of the lug bolt/nut for secure attatchment. As long as it grabs that much of your hub and not go too far through you'll be good!

insame1

There is also the issue of the c63 using m14 bolts and the w203 cars using m12s.

Do your homework guys. You dont need a wheel falling off.

Morphh

rule of thumb is any spacer more then 5mm need longer studs or wheel nutz

insame1

I am not talking about length here but width. The bolts are wider than on 55 or 32. The best way to I have found to judge the length needed is as follows.
1. Grab a stock rim and bolt.
2. Insert bolt into the wheel and measure the length coming out the back
3. Get new wheel and if applicable the spacer and find a bolt that stick out the same amount.

Still this does not change the fact that a m12 bolt is a smaller diameter than a m14 bolt.