I don't think Edabbs was asking about top end speed, or engine RPMs.
I agree completely. The intent of my post was to suggest helpful websites that give good info when comparing tire sizes. The size recommendation had already been given by someone else, so I did not need to comment on it again.
The websites I provided help a person make side by side comparisons. I, for one, want to know what the differences will be in width and diameter if I change tire sizes. It helps me make a decision.
If he ever changes his rear tire size to 215/75/15, then he will be able to see how it will affect his top end speed and engine RPMs.
