Quote:
Originally Posted by tutone
Let's say we tow in 3rd with the r4. I run 235/75s on the back and calculated 55 mph at 1:1. Screenshots below. With the t350 in my 72, I went all over the place with it. I can see why now. I do have a 3:08 gear set and if I do tear this one up [700], i will swap to a 3 speed.
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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.
My 2500 has a 35 inch tire and so even with my (probably) 4.10 rear gears I pull 2160 rpm in third.