CosmosMpower

Does anyone know what the standard offset is for CCW C10 or C14 track wheels for 997 GT3 NB (non RS)? 18x9 and 18x12 widths. I ran 245/645/18 and 315/680/18 Pirelli DH on the CCW's.

I'm trying to find a replacement set and can't find the offset stamped anywhere on the wheels.

Has anyone used OZ Challenge wheels on a 997.1 GT3 NB?

The offset seems to be lower than the Alleggerita which I know works.

https://www.tirerack.com/wheels/Whee...tandard+Brakes

Antonov

I own a set, I want to say they're 68mm offset for NB.

CosmosMpower

Thanks do you know the front offset? 68 is the actual wheel offset minus the factory 5mm spacer in the rear for an effective 63 offset right?

orthofrancis

Stock wheels for the 997.1 nb are

8.5x19 et 53
12x 19 et 68 rear wheels have the 5 mm spacers making effective offset 63. Don't think the fronts do.

r6elmo

i have ccw for my 997.1 i just took off, there arne't any markings though, so down to help if i knew where to look for them or how to mesure.

CosmosMpower

I have a set too but couldn’t find any markings myself

Antonov

They're CCW's so I'll need to measure the backspace and convert from there. I want to say they're 50mm but I need to double check.

-Dino

CosmosMpower

I think 50 front and around 68 rear should be about right. I just ordered a set of OZ Challenge 18x8.5 ET50 and 18x12 ET63 (I won't run the factory spacer). Hope they fit.

Apex996

I know this is an old thread but thought I'd add to it for those like me searching for more detail.
I have a few sets of CCW C14 and was measuring them up tonight. Here's what I found.

Front 1 (9x18)
Backspacing 175mm
Total Width (lip to lip) 255mm
Front lip to mount face 80mm
Offset (calculated) 48mm

Front 2 (9x18)
Backspacing 180mm
Total Width (lip to lip) 255mm
Front lip to mount face 75mm
Offset (calculated) 53mm

Rear 1 (12x18)
Backspacing 235mm
Total Width (lip to lip) 330mm
Front lip to mount face 95mm
Offset (calculated) 70mm

Rear 2 (12x18)
Backspacing 230mm
Total Width (lip to lip) 330mm
Front lip to mount face 100mm
Offset (calculated) 65mm

Give or take a couple mm as I was just trying to get ballpark #s. With these #s I could go to CCW and get exact details.