New tires screwed spedometer...fix?

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Jul 7, 2006 | 08:35 PM

Halloran

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New tires screwed spedometer...fix?

I've got a 99 WS6 and just put on some nice Corvette wheels. The problem is that they are 18's in the rear and 17's in the front. Now my spedometer is messed up. 50 MPH on the spedomoter is more like 65-70 mph. Is there an easy way to fix this?

Thanks

Jul 7, 2006 | 09:16 PM

foff667

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hptuners, efilive, ls1edit, hypertech, predator, etc...bottom line is you need something/someone to recalibrate for the change in tire size.

Jul 7, 2006 | 09:29 PM

ZL1Killa

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or if you don't want to spend the amount of money for that

you could just take it to the dealer and tell them you need it changed for the correct tire size, however that will cost some, but just not as much as buying your own tuning software

Jul 9, 2006 | 11:27 AM

grumpy768

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I did the same thing, got a nice set of American Racing rims 18" in the rear and 17" in the front and did change me speedo cal but now I get ABS and parking brake light when I go over 60 MPH.

Jul 9, 2006 | 12:31 PM

bmfcamaro

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the offset sizes, the bcm doesnt like that

Jul 9, 2006 | 03:55 PM

GuitsBoy

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What size tire is on there? I was under the assumption it was less than a half inch difference, and still considered a 26" tire. Shouldnt be that big a difference between real and indicated speed.