RSGulp

Does anyone have a quick answer for me. I've found some 18" wheels for sale but need to know asap if they'll fit my RS.

What is the ideal 18" fr/rr wheel size(width) and offset for an RS? And is there a 'range' of sizes and offsets which will fit.

Currently running 17" mags with 18mm spacers on the rear (I assume I'll need to ditch the spacers?).

Many thanks.
Rich

sten gr

My BBS rims is 8,5” and 10” x j18" don’t know if I remember the offset, but could be 44mm in front and 50 ore something mm back

I also got Copies of Speedline by RH in same dim. But offset is different and I use a 15 mm spacer on the front wheels.

I can check the offset to morrow. If you still need it.

Strega(UK)

I think I have read that the 18's fited by Porsche on a cup car are fr-8" 52mm offset, rr-9.5" 47mm offset

sten gr

BBS 10Jx18" ET 40 8,5Jx18 ET 44 no spacer
RH 10Jx18" ET 40 8,5Jx18 ET 59 15mm spacer front

RSGulp

Thanks for the info guys. Still waiting for the seller to get back to me with rim widths and offsets. Thanks for your help.

Robert CH

The original wheel size of a 1992 Cup 964 with 18" Speedline rims is:

- Front: 18" x 8.5J (offset 52mm)
- Rear: 18" x 9.5J (offset 47mm)

It fits perfekt for all 964er without wheel spacers (see picture below)...

Kind Regards from Switzerland,
Robert