225/75R15 vs 31X10.50R15

225/75R15 vs 31X10.50R15: Comparision Size Chart


225/75R15 (Tire 1)31X10.50R15 (Tire 2)Difference
Tire Size In Inches28.3X8.9R1531X10.50R15
Diameter28.29"718.5 mm30.98"787 mm9.53%
Tread Width8.9225 mm10.5"267 mm18.67%
Rim Diameter15"381 mm15"381 mm0%
Sidewall Height6.64"168.75 mm7.99"203 mm20.3%
Circumference88.88"2257.23 mm97.33"2257.23 mm9.53%
Revs/Mile712.87 Revs/Mile650.98 Revs/Mile-61.89
Revs/Kilometer442.96 Revs/Mile404.5 Revs/Mile-38.46
Tire 1 Front View
8.9"
28.29"
Tire 2 Front View
8.9"
30.98"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
88.88"
15"
6.64"
712.87 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
97.33"
15"
7.99"
650.98 Revs/Mile

Speedometer Error

225/75R15 (Mph)31X10.50R15 (Mph)
2021.91
3538.34
5054.77
6571.19
8087.62
9098.58
100109.53

31X10.50R15 vs 225/75R15: Gas Mileage & Performance Comparison

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

225/75R1531X10.50R16
Wet/Snowy RoadsBetter TractionReduced Traction
Rough TerrainReduced StabilitySmoother Ride
Handling/SteeringLess ResponsiveBetter
Gas MileageGoodBetter
Road NoiseQuieterQuiet
CostLess ExpensiveMore Expensive

Can You Replace The 225/75R15 With The 31X10.50R15?

No, both tires have the same rim diameter, but the 31X10.50R15 has a bigger overall diameter than the 225/75R15 which is 8.7% (2.69-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 225/75R15 tire will only fit on a 15″ 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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