285/65R20 vs 275/65R20

285/65R20 vs 275/65R20: Comparision Size Chart


285/65R20 (Tire 1)275/65R20 (Tire 2)Difference
Tire Size In Inches34.6X11.2R2034.1X10.8R20
Diameter34.59"878.5 mm34.07"865.5 mm-1.48%
Tread Width11.2285 mm10.8"275 mm-3.51%
Rim Diameter20"508 mm20"508 mm0%
Sidewall Height7.29"185.25 mm7.04"178.75 mm-3.51%
Circumference108.67"2759.89 mm107.03"2759.89 mm-1.48%
Revs/Mile583.05 Revs/Mile591.98 Revs/Mile+8.93
Revs/Kilometer362.29 Revs/Mile367.84 Revs/Mile+5.55
Tire 1 Front View
11.2"
34.59"
Tire 2 Front View
11.2"
34.07"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
108.67"
20"
7.29"
583.05 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
107.03"
20"
7.04"
591.98 Revs/Mile

Speedometer Error

285/65R20 (Mph)275/65R20 (Mph)
2019.7
3534.48
5049.26
6564.04
8078.82
9088.67
10098.52

275/65R20 vs 285/65R20: Gas Mileage & Performance Comparison

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

285/65R20275/65R20
Wet/Snowy RoadsReduced TractionBetter Traction
Rough TerrainSmoother RideReduced Stability
Handling/SteeringBetterLess Responsive
Gas MileageBetterGood
Road NoiseQuietQuieter
CostMore ExpensiveLess Expensive

Can You Replace The 285/65R20 With The 275/65R20?

Yes, both tires have the same rim diameter, and the 275/65R20 has a smaller overall diameter than the 285/65R20 which is only 1.5% (0.52-inch), it is the allowable margin (±3%).

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 285/65R20 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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