Look up your tire size on the Tire Rack. The spec will give you revs per mile. Multiply that by your rearend ratio and you have your driveshaft rpm at 60 mph.


1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!