SidewallerTire & wheel calculators

295/55R20 vs 275/65R20

275/65R20 is 4.0% taller (+1.30 in) and 0.79 in narrower than 295/55R20.

Caution
Check before you buy

275/65R20 is 4.0% taller than 295/55R20. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

295/55R20275/65R20Change
Diameter32.78″34.07″+1.30″+4.0%
Width11.61″10.83″−0.79″−6.8%
Sidewall6.39″7.04″+0.65″+10.2%
Circumference103.0″107.0″+4.1″+4.0%
Wheel20″20″Same
Revs per mile615592−23
SideTread
295/55R20275/65R20
Speedometer shows 60 mph62.4mph

Real speed on 275/65R20.

Ground clearance+0.65in

Change in height under the axle.

Width per side−0.39in

On the same wheel, split inboard and outboard.

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295/55R20 or 275/65R20?

Can I use 275/65R20 instead of 295/55R20?

275/65R20 is 4.0% taller than 295/55R20. 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 275/65R20 you are really doing 62.4 mph if the speedometer was set up for 295/55R20. Going the other way, 295/55R20 would make it read 57.7 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.65 in (+17 mm) under the axle.

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