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'15 Grandokee Overland
176 Posts
If you have a way to measure actual speed, I would be interested in what your speedo reads at 60mph.

The 275/55-20s calculate to be 31.9" tall, and I have a set of Nitto '421s that size on my '13 Limited with QL. They don't rub anywhere, any time. I drive my GC around town in Sport mode which lowers it about a half-inch.

I use a Garmin GPS receiver which indicates speed to the tenth of an MPH. Using that and comparing the speedo' and GPS readings at about 2-dozen speeds, my speedometer is 3.1% slow. That means it indicates about 58MPH at actual 60MPH.
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