SidewallerTire & wheel calculators

235/70R17 vs 275/65R17

275/65R17 is 3.7% taller (+1.12 in) and 1.57 in wider than 235/70R17.

Caution
Check before you buy

275/65R17 is 3.7% taller than 235/70R17. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

235/70R17275/65R17Change
Diameter29.95″31.07″+1.12″+3.7%
Width9.25″10.83″+1.57″+17.0%
Sidewall6.48″7.04″+0.56″+8.7%
Circumference94.1″97.6″+3.5″+3.7%
Wheel17″17″Same
Revs per mile673649−24
SideTread
235/70R17275/65R17
Speedometer shows 60 mph62.2mph

Real speed on 275/65R17.

Ground clearance+0.56in

Change in height under the axle.

Width per side+0.79in

On the same wheel, split inboard and outboard.

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235/70R17 or 275/65R17?

Can I use 275/65R17 instead of 235/70R17?

275/65R17 is 3.7% taller than 235/70R17. 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 275/65R17 you are really doing 62.2 mph if the speedometer was set up for 235/70R17. Going the other way, 235/70R17 would make it read 57.8 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.56 in (+14 mm) under the axle.

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