285/70R17 vs 275/65R18

285/70R17 vs 275/65R18: Comparision Size Chart


285/70R17 (Tire 1)275/65R18 (Tire 2)Difference
Tire Size In Inches32.7X11.2R1732.1X10.8R18
Diameter32.71"830.8 mm32.07"814.7 mm-1.94%
Tread Width11.2285 mm10.8"275 mm-3.51%
Rim Diameter17"431.8 mm18"457.2 mm5.88%
Sidewall Height7.85"199.5 mm7.04"178.75 mm-10.4%
Circumference102.76"2610.04 mm100.75"2610.04 mm-1.94%
Revs/Mile616.58 Revs/Mile628.88 Revs/Mile+12.3
Revs/Kilometer383.13 Revs/Mile390.77 Revs/Mile+7.64
Tire 1 Front View
11.2"
32.71"
Tire 2 Front View
11.2"
32.07"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
102.76"
17"
7.85"
616.58 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
100.75"
18"
7.04"
628.88 Revs/Mile

Speedometer Error

285/70R17 (Mph)275/65R18 (Mph)
2019.61
3534.32
5049.03
6563.74
8078.45
9088.25
10098.06

275/65R18 vs 285/70R17: Gas Mileage & Performance Comparison

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

285/70R17275/65R18
Wet/Snowy RoadsReduced TractionBetter Traction
Rough TerrainSmoother RideReduced Stability
Handling/SteeringBetterLess Responsive
Gas MileageBetterGood
Road NoiseQuietQuieter
CostMore ExpensiveLess Expensive

Can You Replace The 285/70R17 With The 275/65R18?

Definitely no, because these 2 tires are different overall rim sizes.

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 285/70R17 tire will only fit on a 17″ 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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