The car: 2008 CTS V6 AWD. The question: Tires are 235 50 R 18. Want to get spare rim. Do I need an 8" width or 8 1/2"? Does it matter?

Asked by Dec 31, 2016 at 10:29 AM about the 2008 Cadillac CTS 3.6L DI AWD

Question type: Maintenance & Repair

Car did not come with a spare.  Hate donuts.  Trying to put together a
mounted spare.  The latest wrinkle is do I need an 8" or 8 1/2" width rim?  
Does it matter?

2 Answers


Check with a Cadillac dealership for advise on what wheel to use.

Hi Bob, Unfortunately the Caddy dealership approach did not work. They will try to find me a wheel and tire....should cost around $350 or they can order me a donut/jack/lug wrench for $740 (yeah, $740). While very polite, they are not providing any part numbers or other details!

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