speedo and new wheels

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Apr 20, 2005 | 12:40 AM

tx05cobalt

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From: Texas

speedo and new wheels

Does anyone know how I would go about getting my computer changed to recognize a different size of wheel. Ill be going from the 15's which is 195/60/15 to 215/45/17

Apr 20, 2005 | 01:16 AM

Eddie

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From: patterson, ca

take it to gm and have them look into it. personally i dont think it will be too off. maybe 1-2 miles per hour. if you get everything sized correctly.

Apr 20, 2005 | 04:14 AM

t347

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From: Saskatchewan Canada

Use this to figure out the difference:
Tire Size Calculator

The 17's will be slightly larger than stock. Your speedo will be off by 1.6%... no big deal IMO.

Apr 20, 2005 | 11:23 AM

tiny

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From: Rochester, NY

go with + sizing

Apr 20, 2005 | 02:10 PM

jerm

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From: Austin, TX

If you're really picky about the precise measurements, then take it to a shop (with proper equipment) or the dealer to have your speedometer calibrated.