North American Motoring - Speedometer (and odo) difference with 205/50-15's

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rob_lewis

Apr 13, 2004 10:06 AM

I don't have the mental capacity to figure it out right now, so I though I would ask.

How much of a difference in your speedometer do 205/50-15's make in comparison to stock (stock 15's) or 205/55-15's?

I think the difference will increase as speed does (like 2 MPH off at 30 and 4 MPH off at 60)? If so, anybody got a ballpark for 60 MPH?

Just trying to decide which tires. (Daily driver, BTW).

-Rob

dcsmd007

Apr 13, 2004 10:16 AM

At 30 mph, it's off by 1.05 mph. At 60, off by 2.10.

Try this program to calculate speed variations between different tire sizes.

rob_lewis

Apr 13, 2004 10:56 AM

Excellent site! Thank you very much.

Still haven't decided, yet, but now I have a reference point to work with.

-Rob

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