OEM Cayenne Wheel Specs

[Bobcat Sig]

If my interwebbing is at all correct, there seems to be some differences between the 955/7 and the 958 wheels. I know they are interchangeable between vehicles, but I suspect there's some difference between the backspacing and offsets.

 

I'm  trying to get some some proper and semi-aggressive AT tires fitting to my CD. While I know the OEM 255/55-18 tires will fit with no issues, I'm wondering if I can't get a slightly taller and/or wider tire on my rig. Having access to OEM wheel specs should help me in that quest.

 

Can you point me to a resource for OEM wheels specs? Specifically, the 18 inch wheels?

 

Thanks

[scanner-1]

Your owner's manual will have the OEM wheel specs, then I have found the following site helpful:

 

https://www.wheel-size.com/calc/?wheel1=275-45-20X9ET57&wheel2=275-45-20X9ET60&fcl=50mm&scl=50mm&wcl=30mm&sr=0mm

[Bobcat Sig]

Terrific, thank you. I only received the paper owner's manual with the car and wheel specs aren't included in that. I did, however, find the online manual and the wheels spec. 

 

it looks like there is very little offset difference between the two wheels; the 21" I have now with 50mm offset and the 18' wheels I'm looking with an offset of 53mm. Although running it through a calculator, it appears the 18" wheel face will sit inboard 28mm. So, if I want to maintain the somewhat flush look that I currently have with the 21" wheels, I'll need spaces?