SidewallerTire & wheel calculators

265/70R17 vs 285/75R17

285/75R17 is 7.0% taller (+2.22 in) and 0.79 in wider than 265/70R17.

Large
Big change

285/75R17 is 7.0% taller than 265/70R17. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.

265/70R17285/75R17Change
Diameter31.61″33.83″+2.22″+7.0%
Width10.43″11.22″+0.79″+7.5%
Sidewall7.30″8.42″+1.11″+15.2%
Circumference99.3″106.3″+7.0″+7.0%
Wheel17″17″Same
Revs per mile638596−42
SideTread
265/70R17285/75R17
Speedometer shows 60 mph64.2mph

Real speed on 285/75R17.

Ground clearance+1.11in

Change in height under the axle.

Width per side+0.39in

On the same wheel, split inboard and outboard.

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265/70R17 or 285/75R17?

Can I use 285/75R17 instead of 265/70R17?

285/75R17 is 7.0% taller than 265/70R17. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears. 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 285/75R17 you are really doing 64.2 mph if the speedometer was set up for 265/70R17. Going the other way, 265/70R17 would make it read 56.1 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +1.11 in (+28 mm) under the axle.

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