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2018 BMW 3 AND 4-SERIES FORUMS Wheels and Tires Wheel Bolt Circle

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      11-17-2018, 01:03 PM   #1
ted99
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Wheel Bolt Circle

I was just looking at a site that reports on the wheel bolt circle sizes of all makes of cars and they report a surprising piece of info. They list the G20 wheels as 7.5j x 18 with a bolt circle of 120mm and center of 72.6mm. They do not record the offset.

This is a big surprise as I thought all the next generation of BMW's had gone to the 112mm x 66.6 hole.

The new 112 mm x 66.6 size was disappointing to me as it meant that I could not reuse my old wheels/tires.

This is a big deal if true. Can anyone else confirm that BMW has continued with the 120 x 72.6 mm size for the G20?
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      11-17-2018, 02:47 PM   #2
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Quote:
Originally Posted by ted99 View Post
I was just looking at a site that reports on the wheel bolt circle sizes of all makes of cars and they report a surprising piece of info. They list the G20 wheels as 7.5j x 18 with a bolt circle of 120mm and center of 72.6mm. They do not record the offset.

This is a big surprise as I thought all the next generation of BMW's had gone to the 112mm x 66.6 hole.

The new 112 mm x 66.6 size was disappointing to me as it meant that I could not reuse my old wheels/tires.

This is a big deal if true. Can anyone else confirm that BMW has continued with the 120 x 72.6 mm size for the G20?
Has BMW actually put the detail in their media/technical data releases? Not seen it myself in any tech' data. What I understand, BMW changed PCD and bore size for all new models.

This was stated in BMW G30 technical data.

Quote:
Wheel Hub
The hub and hole circle diameter on current vehicles produced by the BMW Group was modified in 03/2014. The hub diameter was reduced from 72.5 mm to 66.5 mm. The hole pattern was modified from 5 x 120 (F01/F10) to 5 x 112 (G12/G30).

I'm expecting G20 hubs to follow the same revised dimensions.
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      12-03-2018, 02:41 PM   #3
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Considering G20 is on the CLAR platform, it seems more likely that the site you were reading was just plain wrong and assumed something they should have.

It would be illogical for BMW to migrate to 5-112mm on all their cars except for just the 3 series.
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      12-04-2018, 03:21 AM   #4
mathys
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Quote:
Originally Posted by upsidedownfunnel View Post
Considering G20 is on the CLAR platform, it seems more likely that the site you were reading was just plain wrong and assumed something they should have.

It would be illogical for BMW to migrate to 5-112mm on all their cars except for just the 3 series.
+1
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      12-04-2018, 11:35 AM   #5
ted99
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I just WANT the site to be correct, so badly. Checked and the site is still listing it that way, though it makes no sense, unless BMW is going to revert to 5 x 120mm across the line and the G20 is the first one up.
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      01-24-2019, 12:01 PM   #6
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bump! hoping to use my extra wheels from 2016 340 on 2020 m340 for winter tire/wheel set up.
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      02-14-2019, 01:51 PM   #7
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We're expecting it to be 5x112 66.6 with conical seat lugs similar to most of the other newer models. I don't see why the G20 would be any different. It may make looking for wheels a difficult task as many aftermarket wheels with this PCD and hub bore will be designed for use with Audi/VW/Mercedes ball seat lugs.

In any case, this won't be an issue for us as we custom machine everything to spec for each application anyways. Now, we just need to track one down to bring in for some R&D test fitting!
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