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Old 08-24-2018, 05:01 PM   #1 (permalink)
Cowpig
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longer wheel studs for 8 lug rear?

anyone know where to find longer wheel studs?

i have a 2008 c4500 4x4, 8 lug - cab/chassis ambulance conversion. I put alcoa 22.5's and 10r22.5's on it, but with the rear airbags (monroe truck equipment MTE) there is almost no clearance from the tire to the bag.

I was able to get 1/2" aluminum spacers through BORA ... but now I can't seem to find a source for 1/2" longer wheel studs ....

i'm willing to go a custom builder for these studs... can't find one of those either but then maybe I'm not looking in the right places on the internet?

thanks for any help - has anyone put spacers on their trucks? (the rear is an alcoa aluminum wheel with the steel inner dually - doesn't leave enough extra thread to also use the 1/2" spacer)

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Old 08-24-2018, 07:36 PM   #2 (permalink)
heymccall
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Couldn't even tell us that they're M20x1.5 @ 3.67 inches long, eh? Are they? I can't find hub interface diameter, but Euclid lists these.

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Old 08-25-2018, 10:21 AM   #3 (permalink)
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Originally Posted by heymccall View Post
Couldn't even tell us that they're M20x1.5 @ 3.67 inches long, eh? Are they? I can't find hub interface diameter, but Euclid lists these.
well... that's part of the issue, and actually after much research and searching (to include the service manuals I own for this truck) I wasn't sure i even had the right stock lug measurements

what I found for an '08 c4500 8-lug was:

GM p/n 88936162
Dorman p/n 610-525

M20x1.5 ... serrated ... 21mm knurl ... but 74.2mm (2.921") long. where did you find the 3.67" measurement? is that the OAL rather than thread+shoulder area?
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Old 08-25-2018, 02:53 PM   #4 (permalink)
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I googled "C5500 rear wheel stud", plus the added self learned spec of M20X1.5 .
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Old 09-06-2018, 11:18 AM   #5 (permalink)
luchenbach
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I remember that others have had this issue and were able to slide their airbags inward enough to get enough clearance to allow the wheels to work with the airbags. I am not sure if they were using the same wheels as you have, or if they had to elongate the mounting holes for the airbags mounts.
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