SidewallerTire & wheel calculators

245/70R17 vs 265/60R18

265/60R18 is 0.1% taller (+0.02 in) and 0.79 in wider than 245/70R17.

OK
Close match

265/60R18 is 0.1% taller than 245/70R17. That is inside the ±3% most shops treat as a straight swap.

245/70R17265/60R18Change
Diameter30.50″30.52″+0.02″+0.1%
Width9.65″10.43″+0.79″+8.2%
Sidewall6.75″6.26″−0.49″−7.3%
Circumference95.8″95.9″+0.0″+0.1%
Wheel17″18″+1″
Revs per mile661661−0
SideTread
245/70R17265/60R18
Speedometer shows 60 mph60.0mph

Real speed on 265/60R18.

Ground clearance+0.01in

Change in height under the axle.

Width per side+0.39in

On the same wheel, split inboard and outboard.

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245/70R17 or 265/60R18?

Can I use 265/60R18 instead of 245/70R17?

265/60R18 is 0.1% taller than 245/70R17. That is inside the ±3% most shops treat as a straight swap. 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 265/60R18 you are really doing 60.0 mph if the speedometer was set up for 245/70R17. Going the other way, 245/70R17 would make it read 60.0 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.01 in (+0 mm) under the axle.

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