[LedZepplin77]

I was looking at some 17" Mustang wheels because I cannot find any 16" Bullit rims. My questions is, if I upgrade will it affect my odometer? I mean with the larger radius, theoretically it should affect the distance my car is measuring per wheel rotation right? Thanks!

[05horse]

yea it will, but ull be really close

a tuner can fix that

but 1 inch shouldent make that much of a difference, i think the biger u go the slower ur speedo will read and the less miles ull put one becaus the engine and rear end turn less to get u further.

but 1 inch is really insigificant i belive

( i seen the plans its gonna look sharp )

[strathmustang]

the gts came stock with 17's so the odometer shouldnt be to much different...i have 17's on my 95 v6 and didnt really notice a difference

[longalan2]

i have a set of gt take offs that are 17s and my speedo is fine. the 17s have a lower profile tire so it keeps the geometry pretty much the same as stock.

[stlwagon]

The wheel size has no bearing on the speedometer. It's the tire height that matters.

[Jmac289GT]

Slt is correct, there is also a tire calculator online that you can put your stock tire size in and what you want to put on and it will tell you how it will affect your speedometer.

I think it is www.tirecalculator.com

[jcvelli]

if a person were hypothetically to use a tuner to alter the height of the tire without actually changing the tire, could that person significantly reduce the miles gained on the odometer?

[Mach 13]

I changed my instrument cluster to the 6 gauge with Information Center and My Color. I noticed that the speedometer doesnt match the GPS by about 2- 3 Miles per hour. My car has 16" tires and wheels. I wonder if the car that the cluster came out of had 17" tires and wheels.