Wheel spacers - Mercedes-Benz Forum
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post #1 of 12 (permalink) Old 05-05-2018, 05:07 AM Thread Starter
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Wheel spacers

Ran across an unexpected deal on 3 R129 rims. Eventually need to find a 4th one

The rim size is 16 x 8 with a 34mm offset.

Looking through this forum ideal offset for this size rim would be 11mm. I found posts about using 20mm spacers but none using 25mm spacers
I like the 25mm spacers because they bolt to the hub and the wheel would bolt to the spacer eliminating the need for long bolts.
Any concerns using 25mm spacers?
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post #2 of 12 (permalink) Old 05-05-2018, 10:21 AM
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8X16 ET34 wheels with 25 mm spacers will put the edge of the rim 28 mm further outboard than the stock 7x15 ET25 wheels. Measure your fender clearance to see if there is room to spare.
If you go with fatter tires than the stock 205, things will get tighter.

FWIW I am running 7.5x17 ET37 (no spacer) with 245 width tires. The car drives fine and looks good to me.

Last edited by dugald; 05-05-2018 at 10:27 AM.
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post #3 of 12 (permalink) Old 05-05-2018, 11:23 AM
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15 mm spacers are optimal for those with rolled fenders and 225 50 series tires. 11mm will work if you don't put wheel weights on the inner rim. 25mm spacers and your screwed.
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post #4 of 12 (permalink) Old 05-05-2018, 11:37 AM
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The wheels in this thread are the same size and ET as yours.

https://www.benzworld.org/forums/r-c1...d-machine.html
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post #5 of 12 (permalink) Old 05-05-2018, 12:15 PM
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JR, the referenced thread in post 4 concludes that ET11 is needed which contradicts your advice in post 3 to use 15 mm spacers (effective ET19).
Meanwhile I gave some bad info in post 2. My tires are 225 not 245.
Betcha the OP is truly confused now.
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post #6 of 12 (permalink) Old 05-05-2018, 01:19 PM Thread Starter
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I am sure well get it all sorted out by time Ill buy spacers.
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post #7 of 12 (permalink) Old 05-05-2018, 03:42 PM
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Well spacers are a pita and actually illegal in some places. JR's experience suggests you may need them for inside clearance but mine suggests you may not.
A trial fit is in order.
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post #8 of 12 (permalink) Old 05-05-2018, 05:44 PM
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Quote:
Originally Posted by dugald View Post
JR, the referenced thread in post 4 concludes that ET11 is needed which contradicts your advice in post 3 to use 15 mm spacers (effective ET19).
Meanwhile I gave some bad info in post 2. My tires are 225 not 245.
Betcha the OP is truly confused now.
Your actually correct I started out with 15's went to 20's or 25's in the end when I noticed the rubbing on the shock towers. They are on my car now they look like 25's looking through the spokes.

Sorry for the confusion and thanks for pointing that out.
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post #9 of 12 (permalink) Old 05-05-2018, 05:56 PM
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Well according to this post it looks like I ended up with 4 20mm spacers. Wont really know until I take them off.

Just confirmed they are 20mm. Found my E-bay purchase record.

https://www.benzworld.org/forums/r-c1...l-spacers.html
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Last edited by roncallo; 05-05-2018 at 05:59 PM.
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post #10 of 12 (permalink) Old 05-05-2018, 06:10 PM
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Quote:
Originally Posted by RLT61 View Post
Ran across an unexpected deal on 3 R129 rims. Eventually need to find a 4th one

The rim size is 16 x 8 with a 34mm offset.

Looking through this forum ideal offset for this size rim would be 11mm. I found posts about using 20mm spacers but none using 25mm spacers
I like the 25mm spacers because they bolt to the hub and the wheel would bolt to the spacer eliminating the need for long bolts.
Any concerns using 25mm spacers?
The thing I don't like about the spacers that bolt to the hub and then wheel bolts to the spacer is that if they are made of Aluminum a longer bolt should be used anyway. You will have about 12mm of bolt into the Aluminum you really should have at least 20. If you can get the spacers are made of steel this shouldn't be a problem.
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