SidewallerTire & wheel calculators

235/70R17 vs 235/75R17

235/75R17 is 3.1% taller (+0.93 in) and the same width than 235/70R17.

Caution
Check before you buy

235/75R17 is 3.1% taller than 235/70R17. It often still fits, but expect a noticeable speedometer error and check clearance at full steering lock.

235/70R17235/75R17Change
Diameter29.95″30.88″+0.93″+3.1%
Width9.25″9.25″0.00″0.0%
Sidewall6.48″6.94″+0.46″+7.1%
Circumference94.1″97.0″+2.9″+3.1%
Wheel17″17″Same
Revs per mile673653−20
SideTread
235/70R17235/75R17
Speedometer shows 60 mph61.9mph

Real speed on 235/75R17.

Ground clearance+0.46in

Change in height under the axle.

Width per side0.00in

On the same wheel, split inboard and outboard.

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235/70R17 or 235/75R17?

Can I use 235/75R17 instead of 235/70R17?

235/75R17 is 3.1% 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 235/75R17 you are really doing 61.9 mph if the speedometer was set up for 235/70R17. Going the other way, 235/70R17 would make it read 58.2 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.46 in (+12 mm) under the axle.

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