Quote:
Originally Posted by dagnabbitt
That's a really neat calculator, I punched my own numbers into it and was surprised just how great an influence tire diameter is upon rpm.
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Yes, the calculator is good to see what RPM you will get with x size tire & rear gear....in lieu of having a tach
I just got my 72 C10 a few months ago. The tires on it, BFG WWL, were full tread....but 21 years old so I put new, larger, tires on it. About 2" more in diameter (29.8"). Even with my 3:73 & 3 OTT the RPM's are tolerable now at 65 mph so yes tire diameter certainly makes a difference in RPM's