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Ghiamia
Samba Member
Joined: April 01, 2023
Posts: 9
Location: Massachusetts USA
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 Posted: Fri Aug 23, 2024 11:23 am Post subject: early VW lug ball end bolt radius |
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| Does anyone know the radius of a 12x1.50 ball seat bolt-to-rim hole on a stock 5x205 rim? Some bolts for Mercedes, and Porsche 356 use the same m12x1.50s, as well as other cars, but is the seat radius the same? Is it R12, R13, or R14? Thanks |
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finster
Samba Member
Joined: May 26, 2012
Posts: 8871
Location: north o' the border
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| Posted: Sat Aug 24, 2024 3:50 am Post subject: Re: early VW lug ball end bolt radius |
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this is from a site search -
| mhoriuchi wrote: |
R14 is correct 
Typically, the radius of a ball seat is in correlation to the stud size. So an M12 tends to be an R12 and an M14 is an R14. Oddball hybrid stuff like an R13 radius on an M14 bolts is mainly seen on newer custom wheels (usually so you have to buy their proprietary bolts).
VW had both M12 and M14 lug bolts and M14 lug nuts and the radius correlated to their size . Porsche only ever used M14 stuff on their air-cooled cars that I'm aware of and they were all R14. Porsche also shared parts with VW anywhere they could since it was cheaper (it's easy to forget how small of a company Porsche was at the time).
The lug bolts in the listing's VW part number is N0201121 (or N201121 way back when before they needed more digits). Porsche used the same part number - just for giggles I pulled 356, 911, and 914 parts books to verify. You can actually order these exact same lug nuts from both your local VW and Porsche dealerships under that part number still (but from VW they are $5.09 each while they are $11.10 each from Porsche). |
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Ghiamia
Samba Member
Joined: April 01, 2023
Posts: 9
Location: Massachusetts USA
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| Posted: Sun Aug 25, 2024 12:20 pm Post subject: Re: early VW lug ball end bolt radius |
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| Great info, much thanks! |
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