I am looking at some aftermarket replica wheels. Vendor can't tell me whether I'll need new lug bolts. He said most MB cars typically do, but only my installer will know for sure when he test fits the wheel. Can someone give me some basic guidance on what to expect? I'm not used to dealing with lug bolts (I know nuts, but not bolts).

 

You'll need to take your original wheel off and with the original lug bolt, measure the amount that sticks out. I think I recall mine being about 10mm (they say you need 7 - 10 thread engagements for a safe install).

Next, you'll need to determine whether the new replica rims are cone seats or ball seats. Mercedes uses ball seat for the GL350 so I think it would probably be across the board. You can stick plastercine into the replica rim and look at the impression to determine whether it is cone like or ball (more round) like.

Now, once you know which type it is, you can put your original bolt through and see if its sticking out too long or not enough and make your measurement again. If its not around that 10mm, you'll need calculate your new thread length. Make sure you don't go to long because you could damage the ABS system further in the wheel hub (at least thats what I was told).

Hope that helps...

 

Very helpful thanks