Spacer Issue




i have a 2012 E550 cab and about 6 months ago I installed spacers (10mm front/15mm rear) and longer bolts. Last night as I was driving from my house I heard a thumping and thought I had s flat. When I got out to look, the wheel was being held on by only one bolt. The other 4 had broken. When I got the wheel off the spacer had broken on the hub centric collar. I’m trying figure out what happened. I’m thinking the spacer hub broke and started slightly moving and placed more stress on the bolts, causing them to break. Any other theories?
Last edited by Davery; May 25, 2018 at 05:11 PM. Reason: Picture




If you take spacer <5mm, the original rim will center the wheel, the spacers >=20 mm have separate bolts for the spacer and separate for wheel, so even there is margin for misalignment, they are solid.
What you have is forced design when the rim is not having enough "meat" to hold the wheel and looks like cheap bolts.
It is the bolts that should hold the wheel, when spacer is just for initial centering, so blame the bolts.
Watch and learn..
Spacers do not hold on wheels. Bolts do. Would like to know the vendor and length of bolts.
Bolts weren’t tightened or something and eventually loosened. Maybe wrong length and bottomed out. Lots of possibilities.
You were very lucky my friend. I'm assuming the remaining wheels will be addressed as well.
PS and my spacers were 20mm and 26mm
Last edited by GuestFromTampa; May 26, 2018 at 10:41 PM. Reason: PS
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The issue with certain spacers working or not depends on the hub itself. Some cars have a hub ring that sticks out further front to back and some are larger diameter at base and taper down. You put a spacer on such as a 5mm and what lip is left from the hub doesn’t center the wheel.
This is why spacers with a built in lip such as 12mm work. The spacer is centered by the hub lip. Then the spacer has a full lip to center the wheel.
Does that make sense?












