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

 

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.

 

Excellent site! Thank you very much.

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

-Rob