255/55R20 vs 255/50R20

255/55R20 vs 255/50R20: Comparision Size Chart


255/55R20 (Tire 1)255/50R20 (Tire 2)Difference
Tire Size In Inches31.1X10R2030X10R20
Diameter31.04"788.5 mm30.04"763 mm-3.23%
Tread Width10255 mm10"255 mm0%
Rim Diameter20"508 mm20"508 mm0%
Sidewall Height5.52"140.25 mm5.02"127.5 mm-9.09%
Circumference97.52"2477.15 mm94.37"2477.15 mm-3.23%
Revs/Mile649.71 Revs/Mile671.4 Revs/Mile+21.69
Revs/Kilometer403.71 Revs/Mile417.19 Revs/Mile+13.48
Tire 1 Front View
10"
31.04"
Tire 2 Front View
10"
30.04"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
97.52"
20"
5.52"
649.71 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
94.37"
20"
5.02"
671.4 Revs/Mile

Speedometer Error

255/55R20 (Mph)255/50R20 (Mph)
2019.35
3533.87
5048.39
6562.9
8077.42
9087.09
10096.77

255/50R20 vs 255/55R20: Gas Mileage & Performance Comparison

* Below is a comparison table. Assuming 2 tires of the same manufacturer, material and tested on the same road conditions.

255/55R20255/50R20
Wet/Snowy RoadsReduced TractionBetter Traction
Rough TerrainSmoother RideReduced Stability
Handling/SteeringLess ResponsiveLess Responsive
Gas MileageBetterGood
Road NoiseQuieterQuieter
CostMore ExpensiveLess Expensive

Can You Replace The 255/55R20 With The 255/50R20?

No, both tires have the same rim diameter, but the 255/50R20 has a smaller overall diameter than the 255/55R20 which is -3.34% (1-inch).

When you want to replace a different tire size, as a rule, for the rim diameter, you will need to be sure that your tires and rims are an exact match, e.g. a 255/55R20 tire will only fit on a 20″ diameter rim.

You Can check our tools and charts below to find your size:

*Disclaimer: The information provided on the tire size is for general informational purposes only. We recommend that you consult a certified tire specialist or National Highway Traffic Safety Administration (NHTSA) sets specific guidelines for tires used on vehicles.


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Jamie Hicks

Sullivan Kane

Tire Technician at TireSizesCalculator

Sullivan is a Tire Technician specializing in tire repair at TireSizesCalculator. With over 6 years of experience in the industry, Sullivan has become an expert in tire repair, maintenance & installation.


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