285/70R18 vs 285/75R18

285/70R18 vs 285/75R18: Comparision Size Chart


285/70R18 (Tire 1)285/75R18 (Tire 2)Difference
Tire Size In Inches33.7X11.2R1834.8X11.2R18
Diameter33.71"856.2 mm34.83"884.7 mm3.33%
Tread Width11.2285 mm11.2"285 mm0%
Rim Diameter18"457.2 mm18"457.2 mm0%
Sidewall Height7.85"199.5 mm8.42"213.75 mm7.14%
Circumference105.9"2689.83 mm109.42"2689.83 mm3.33%
Revs/Mile598.3 Revs/Mile579.05 Revs/Mile-19.25
Revs/Kilometer371.77 Revs/Mile359.81 Revs/Mile-11.96
Tire 1 Front View
11.2"
33.71"
Tire 2 Front View
11.2"
34.83"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
105.9"
18"
7.85"
598.3 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
109.42"
18"
8.42"
579.05 Revs/Mile

Speedometer Error

285/70R18 (Mph)285/75R18 (Mph)
2020.67
3536.17
5051.67
6567.16
8082.66
9093
100103.33

285/75R18 vs 285/70R18: Gas Mileage & Performance Comparison

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

285/70R18285/75R18
Wet/Snowy RoadsBetter TractionReduced Traction
Rough TerrainReduced StabilitySmoother Ride
Handling/SteeringLess ResponsiveLess Responsive
Gas MileageGoodBetter
Road NoiseQuieterQuieter
CostLess ExpensiveMore Expensive

Can You Replace The 285/70R18 With The 285/75R18?

No, both tires have the same rim diameter, but the 285/75R18 has a bigger overall diameter than the 285/70R18 which is 3.22% (1.12-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 285/70R18 tire will only fit on a 18″ 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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