5x1.20 bolt pattern?

[CamaroJesse]

Im looking to buy some Enkei RPF1's. they are 5x1.20 bolt pattern. will these work on my 68 camaro?

http://www.enkei.com/rpf1.html

[vp23271]

5 x 120 is the BMW bolt pattern

Check out this thread below. Hope the info helps
https://www.pro-touring.com/forum/showthread.php?t=50804&highlight=bmw+bolt

[CamaroJesse]

I read over that whole thread and dont really know what to do. I know there are people using bmw bolt pattern wheels with fine luck. But there are some people that said they wouldnt do it. id be using hub centric rings so id assume it would be fine. Hmmmm....

[FirstGenZq8]

i have nothing to offer except those are an exceptionally lightweight wheel. great choice. for what it's worth i've run 5X120 wheels on my truck for short stints, never over 70 MPH though (i have a 5X120 as a spare).

[b-man]

I bought 5 on 120mm aftermarket wheels for my '64 Tempest, they are of course BMW-spec wheels.

Up front I needed a 1" spacer, so I bought 1" thick billet aluminum adapters to go from the stock 5 on 4.75" (120.65mm) to the 5 on 120mm.

In the rear I'm having the bolt pattern on the rear axles redrilled to the new 5 on 120mm pattern.

[CamaroJesse]

adapters wont be needed with these wheels so i couldnt go that route to change over the pattern. and i really want these wheels. nice wheels that are VERY light and for an excellant price! getting the axles drilled to my spec sounds interesting though. i have ats spindles could i get those re-drilled to 5x1.20 then too? if i could just re-drill these id be completley set.

[CamaroJesse]

but then again, if i got billet hub centrics i would think it would be fine? is there anyone using bmw wheels or anything with a 5x1.20 and racing the car?

[b-man]

It's no big deal to redrill the ATS front hubs for the new 120mm bolt pattern, a competent machine shop should be able to drill a new bolt pattern right in between the old stud holes.

The rear axles are a bit trickier, the large holes in the axle flange for access to the bolts on the bearing retainers will interfere with the ability to locate a new bolt pattern in between the old stud holes.

The answer is to buy a M12X1.5 thread stud with a larger knurl diameter than the original stud, then offset-bore the original hole. You will have to move the center of the stud hole about .013" (13 thousandths of an inch) in towards the center for the new 120mm bolt circle.

After doing some searching on the Dorman website I found some studs that I'm going to try to use, contingent upon finding a shop that can do the offset reaming. My '71-'72 8.5" Buick A-body rear uses Dorman 610-186 OEM studs from the factory, they are 7/16-20 thread, .472" knurl diameter, 1.5" length and a .344" shoulder (essentially the knurl length).

Specs on the new studs I plan to use:

Dorman 610-265 (originally used on '79 -'85 Toyota)
Thread pitch - M12X1.5
Knurl diameter - 14.32 mm (.564") bigger knurl diameter than OEM to enable using the original stud holes to change to the bolt pattern to 120 mm.
Length - 44.5 mm (1.752") this 1/4" longer length than OEM is needed for my rear disc brakes.
Shoulder - 10 mm (.394")

If you can't find a shop who can ream out the axle flanges for the new larger-knurl studs in the 120mm pattern, you might have to buy aftermarket axles with the new 120mm bolt circle you need.

Right now the guy who is doing up my new 8.5" rear end is trying to get my axles modified as outlined above. If he can't, a new pair of Moser axles will be ordered up with the 120mm pattern I want.

[CamaroJesse]

Interesting. That just might be what i will end up doing. I may have to put the wheels on before changing the pattern though. but i would use hub centrics and check torque frequently.