[jimbeasaurus]

Trying to figure out.....are the front and rear WHEEL(not tire) sizes different or no? What sizes are they? both 17x9? Rear 17x9 and front 17x8? any help would be greatly appreciated...

 

[PontiacV8]

Re: 2006 cadillac sts (V6 engine) front AND rear WHEEL sizes......(not tire)???

...stock/base is
17 x 7.5 with 235/50/17 all...

...if your car has the optional "staggered" setup it will be
17 x 7.5 with 235/50/17 front and
17 x 8 with 255/45/17 rear

...next step will be 18"

 

[dkozloski]

Re: 2006 cadillac sts (V6 engine) front AND rear WHEEL sizes......(not tire)???

Pull the hub caps. The wider rear wheels will have "Rear Only" cast into them where you can see it.

 

[Submariner409]

..... and there's an ID cast into one or two spokes.