SidewallerTire & wheel calculators

275/40R22 vs 285/45R22

285/45R22 is 4.7% taller (+1.44 in) and 0.39 in wider than 275/40R22.

Caution
Check before you buy

285/45R22 is 4.7% taller than 275/40R22. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

275/40R22285/45R22Change
Diameter30.66″32.10″+1.44″+4.7%
Width10.83″11.22″+0.39″+3.6%
Sidewall4.33″5.05″+0.72″+16.6%
Circumference96.3″100.8″+4.5″+4.7%
Wheel22″22″Same
Revs per mile658628−29
SideTread
275/40R22285/45R22
Speedometer shows 60 mph62.8mph

Real speed on 285/45R22.

Ground clearance+0.72in

Change in height under the axle.

Width per side+0.20in

On the same wheel, split inboard and outboard.

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275/40R22 or 285/45R22?

Can I use 285/45R22 instead of 275/40R22?

285/45R22 is 4.7% taller than 275/40R22. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock. Also match or beat the original load index and speed rating, and check that the wheel width suits the new tire.

Will my speedometer be off?

At an indicated 60 mph on 285/45R22 you are really doing 62.8 mph if the speedometer was set up for 275/40R22. Going the other way, 275/40R22 would make it read 57.3 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.72 in (+18 mm) under the axle.

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