Tires

[iron man]

Height will effect your speedo and mileometer. Width not so much.

[Goooh]

Originally Posted by iron man

Height will effect your speedo and mileometer. Width not so much.

The number he refers to is directly attached to the width when determining height of the tire.

[pan pan chuck]

You will be going just under 4 mph faster than what your speedometer says.

[iron man]

Originally Posted by Goooh

The number he refers to is directly attached to the width when determining height of the tire.

Yup

[clay67]

Go to the tire manufacturer's website and look up the specs on the tires you have now and compare the overall diameter to the specs of the tires you are getting. Even if two different brands are the same size, the actual size may differ a lot. I have seen some 33" tires that were closer to 32" and others that were closer to 34". Once you have the exact specs you can find an online speedometer correction calculator. I think interco has one on their site.