Tire Diameter
20" tires on a 2013 Ram 1500 have a 32.5 diameter 17" have a 31.7 diameter. What would be the apparent ratio or formula to arrive at such based on 3.55 gears.
Forum Discussion
3.55 in the pinion vs ring gear count. There's a software adjustment to correct the speedo and transmission control. I've been told the putting 17s where there were 20s will make short work of the tranny, which I don't understand, but it came from more than one source unsolicited.
