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Registered 2010 SLK200 Kompressor
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Discussion Starter #1 (Edited)
Looking for some help when my first modification.

I am replacing the stock 16" rims on my SLK and replacing 18" R172 AMG rims. the new rims are:
A1724012702
7.5J X 18 ET 42

A1724012702
8.5J X 18 ET 36

I am told I need a 10mm spacer on all 4 wheels to avoid the brake disc, and M12 bolts with the M14 dome shoulder, which I have sourced a site for.
but cannot find out they length of bolt required or what you do about the 2mm difference in hole size on the rims themselves. Can anyone help?
 

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Administrator 2009 SLK 55 AMG/Founding Member 2006
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Premium Member 2012 SLK55 AMG
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2,473 Posts
Looking for some help when my first modification.

I am replacing the stock 16" rims on my SLK and replacing 18" R172 AMG rims. the new rims are:
A1724012702
7.5J X 18 ET 42

A1724012702
8.5J X 18 ET 36

I am told I need a 10mm spacer on all 4 wheels to avoid the brake disc, and M12 bolts with the M14 dome shoulder, which I have sourced a site for.
but cannot find out they length of bolt required or what you do about the 2mm difference in hole size on the rims themselves. Can anyone help?
You have been well informed regarding the bolts you require. Determining the bolt length required is a bit trickier because you’re going to have different bolt seat depths on the new wheels too.
If you have the new wheels to hand you can make some measurements and compare those measurements to the amount of protrusion on the standard 16” wheel set-up.

Would need rim width and offset for the 16” wheels to confirm whether on not the 10mm spacer is correct.

Putting larger more modern wheels on a car currently running 16” wheels it’s hard to imagine there being any issues with brake clearance. I’d be more concerned about getting the tyre choice correct to avoid fouling on the wheel arches, etc.
 
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