tyre sizes for cup alloys

MattKab · #1 September 17th 2006, 05:50

215/40 and 215/45 on 7.5et52mm under Day Mouldings. Probably the absolute limit, the front is tight with a wheel alignment for cornering such as 2deg -ve camber. Inner sidewall is ~4mm from a 80mm coil, maybe less at the wing.

The rear (also et52mm) is just as tight when the wheel is close to verticle, about 0.75deg -ve.

944 steel arms rear and 951 stubs at the front. No spacers or apapters.

A wheel this size with et23mm on a stock rear drum will be just as tight, the 205/40 'should' make it easier.

BEWARE! Tyre shoulder sizes are not all the same shape and size for a given tyre size, It depends on the make, more on the original application.

I went from 225/45 F1's on the rear as I had to run ~1.5deg -ve camber, I borrowed a pair of 215/45 Pirelli's (P-zero, I think..) clearance was perfect, So I bought my 215/40 F1's and it was tight again

~6mm difference at the wheel arch.

Matt

02cab · #2 September 24th 2006, 16:48

thanks for the info Matt

:agree:

Chisel86 · #3 September 25th 2006, 13:10

I'm using 215/40/17 frt and 225/45/17 rear on 7.5" wide cups. Kuhmo estca 712 (not sure if they still make 'em though) fits just perfect in the rear with stock fenders and susp. (trailing arms, etc.). Front has about 3/16" - 1/4" clearance to the max spring assy. running a 3/8" spacer.

GRMNLK · #4 February 13th 2007, 01:08

17x7.5 Cup 3 replica 205/40 front and 215/45 rears Conti-Extreme-Contact

Adam Lee · #5 February 14th 2007, 09:36

I run 205/40/17's and 215/45/17's on 7" wide cups...

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alanhughes · #6 February 16th 2007, 07:16

adam,

what brake and suspension set up are you running? discs or drums? spacers etc?

cheers

Adam Lee · #7 February 16th 2007, 09:33

Quote:

Originally Posted by alanhughes

adam,

what brake and suspension set up are you running? discs or drums? spacers etc?

cheers

The car runs standard link pin and swing axel suspension, front brakes consist of CB spindles with post 68 beetle standard-ish discs and calipers and the rear s sit on long axels and are a mixture of Porsche 914 discs with Golf GTI calipers. No spacers were needed. The wheels are genuine with an ET55 offset. Hope this helps!

Are you doing something similar?

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