Can I use the stock spare if I go with 20" wheels?

[profusion]

I'm debating on whether to go 20's instead of my current 22's. I love 22" wheels but it such a pain trying to find a shop that would take them. I had a flat and had a hard time finding a shop that can help me right away. So if I go 20's now, can I use the stock spare in an event of a flat/blown tire? Thanks!

[eVoMotion]

Any size wheel would work as long as the diameter of the tires are the same, in theory. You could run an 18, 19, 20 and 22 wheel on your car if the diameters (think height of the tire) are the same.

[profusion]

My 22's are not the same diameter that's for sure.

[eVoMotion]

Then you have a spare and speedo issue.

My 22's are not the same diameter that's for sure.

[hahnmgh63]

Usually when you go up an inch in wheel size you go down by approximately one aspect ratio as EvoMotion elluded to or your speedometer will not read correctly. Here is a great tires size calclulator that you can use to put in your stock size then put on plus one, two, three, etc.. sizes and calculate any speedometer error. http://www.1010tires.com/tiresizecalculator.asp