285/45R22 vs 305/40R22

285/45R22 vs 305/40R22: Comparision Size Chart


285/45R22 (Tire 1)305/40R22 (Tire 2)Difference
Tire Size In Inches32.1X11.2R2231.6X12R22
Diameter32.1"815.3 mm31.61"802.8 mm-1.53%
Tread Width11.2285 mm12"305 mm7.02%
Rim Diameter22"558.8 mm22"558.8 mm0%
Sidewall Height5.05"128.25 mm4.8"122 mm-4.87%
Circumference100.85"2561.34 mm99.31"2561.34 mm-1.53%
Revs/Mile628.26 Revs/Mile638 Revs/Mile+9.74
Revs/Kilometer390.38 Revs/Mile396.44 Revs/Mile+6.06
Tire 1 Front View
11.2"
32.1"
Tire 2 Front View
11.2"
31.61"
Tire 1 Side View
Tire 1 Wheel
Circumference 1
100.85"
22"
5.05"
628.26 Revs/Mile
Tire 2 Side View
Tire 2 Wheel
Circumference 2
99.31"
22"
4.8"
638 Revs/Mile

Speedometer Error

285/45R22 (Mph)305/40R22 (Mph)
2019.69
3534.46
5049.24
6564.01
8078.78
9088.62
10098.47

305/40R22 vs 285/45R22: Gas Mileage & Performance Comparison

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

285/45R22305/40R22
Wet/Snowy RoadsReduced TractionBetter Traction
Rough TerrainSmoother RideReduced Stability
Handling/SteeringLess ResponsiveBetter
Gas MileageBetterGood
Road NoiseQuieterQuiet
CostMore ExpensiveLess Expensive

Can You Replace The 285/45R22 With The 305/40R22?

Yes, both tires have the same rim diameter, and the 305/40R22 has a smaller overall diameter than the 285/45R22 which is only 1.56% (0.49-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 285/45R22 tire will only fit on a 22″ 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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