gellie

Owners manual list 2 different sizes for my C4 How do i know which one is correct? Thanks

front 235/35 ZR 19 (87Y) 8 J x 19 H2 57 mm 58.6 in./1488 mm
rear 305/30 ZR 19 (102Y) XL 11 J x 19 H2 51 mm 60.9 in./1548 mm
or front 235/35 ZR 19 (87Y) 8.5 J x 19 H2 55 mm 58.6 in./1488 mm
rear 305/30 ZR 19 (102Y) XL 11.5 J x 19 H2 50 mm 60.9 in./1548 mm

jhbrennan

Tire sizes are the same so you must be asking about wheel size - specs are for two different types of wheels so they are both "correct" depending on which wheel option was mounted - as long as you adher to the specs you'll be OK.

gellie

Thanks. I have OEM turbo 19' wheels.

KeninBlaine

The same tire sizes are apparently recommended for your car regardless of whether you have 8" or 8.5" front rims and 11" or 11.5" rear rims. Some models use 295/30/19 tires on 11" rims, but in the case of the Targa, the 305 tires are recommended for the rears.

mdrums

?????? Tires are the same 235/35/19 and 305/30/19.....what actually is your question?

Bijan

The wheel size is next to the tire valve for front and rear

Edgy01

Actually--not found on the turbo wheels. They are forged, and that information is not on the front of the wheels unless they are pressure cast and included by the OEM vendor. For the turbo wheels, look on the back for their dimensions.

Bijan

Thanks Dan

Fikse Wheels

The information that is on the factory turbo wheels is on the side of the backpad. You can usually locate this by looking between the spokes. The 8.5/11.5 option is the Carrera Sport wheel. If you have 997 Turbo wheels off of a 997 Turbo then they will be 8.5/11. If they were a factory option for your C4 then they would be 8/11.

gellie

Thanks Alan. I assume either size would work when purchasing new wheels?

mdrums

gellie, either a 295/30/19 or 305/30/19 will work. These are the supplied tire sizes that came on 997 cars...the 295 and 305 depended on if the car was a Turbo or GT3 or came with the Sport wheels like in Edgy's avitar...those were 11.5 wide.

I had 305's on narrow body 997 with Turbo 19x11 wheels on my 2007.

Hope this helps.

okbarnett

they actually put 295/30 on 11" rears. Odd they dont say to use that