Anyone have a OEM wheel lying around that can measure bolt length

[chefwong]

Mods...please don't move as this forum will get more traffic/response than the tire/wheel forum


If anyone has a OEM wheel around, can anyone measure how much bolt length is there from the back of the wheel, after you put the bolt in / seated . It's my understanding the OEM bolt is 33mm, with databases saying 30mm is fine.

I need to determine what bolt length I need with these aftermarket wheels.
Whether it be 30, 33 and or 35..........It's only talking maybe an extra/less thread pitch...but might as well strive for OEM length while I'm at it.

[mrbmwx5]

got wheel and bolt ,but no ruler to measuring.

[TowX]

Originally Posted by chefwong

Mods...please don't move as this forum will get more traffic/response than the tire/wheel forum


If anyone has a OEM wheel around, can anyone measure how much bolt length is there from the back of the wheel, after you put the bolt in / seated . It's my understanding the OEM bolt is 33mm, with databases saying 30mm is fine.

I need to determine what bolt length I need with these aftermarket wheels.
Whether it be 30, 33 and or 35..........It's only talking maybe an extra/less thread pitch...but might as well strive for OEM length while I'm at it.

When I measured the bolts from my 19" wheels, they were 30mm.

Whatever bolts you end up with, two things to keep in mind:
-Conventional wisdom is you need 6 turns for proper thread engagement with a 14mm shank like BMW uses
-Be sure you order the correct bolt seat- cone or ball seat. Not all wheels are the same and buying the wrong ones will cause the wheel to not hold torque.

[chefwong]

In my research, it appears the majority of posters stated 33mm.
Tirerack's computer says 30mm.

I just measured the bolts that I used with my HRE's.
Only 27mm.

So now it's turning into a POLL .
Should I go with 30mm bolts or 33mm

And for those wondering why not use the OEM bolts....I can't.
I need a 14mm , 1.5 cone with a 17mm head.