SidewallerTire & wheel calculators

285/65R18 vs 295/70R18

295/70R18 is 5.1% taller (+1.67 in) and 0.39 in wider than 285/65R18.

Large
Big change

295/70R18 is 5.1% taller than 285/65R18. Beyond 5% you usually need a lift or leveling kit, a speedometer recalibration and sometimes new gears.

285/65R18295/70R18Change
Diameter32.59″34.26″+1.67″+5.1%
Width11.22″11.61″+0.39″+3.5%
Sidewall7.29″8.13″+0.84″+11.5%
Circumference102.4″107.6″+5.3″+5.1%
Wheel18″18″Same
Revs per mile619589−30
SideTread
285/65R18295/70R18
Speedometer shows 60 mph63.1mph

Real speed on 295/70R18.

Ground clearance+0.84in

Change in height under the axle.

Width per side+0.20in

On the same wheel, split inboard and outboard.

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285/65R18 or 295/70R18?

Can I use 295/70R18 instead of 285/65R18?

295/70R18 is 5.1% taller than 285/65R18. 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 295/70R18 you are really doing 63.1 mph if the speedometer was set up for 285/65R18. Going the other way, 285/65R18 would make it read 57.1 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.84 in (+21 mm) under the axle.

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