SidewallerTire & wheel calculators

295/70R18 vs 35x12.50R18

35x12.50R18 is 2.2% taller (+0.74 in) and 0.89 in wider than 295/70R18.

OK
Close match

35x12.50R18 is 2.2% taller than 295/70R18. That is inside the ±3% most shops treat as a straight swap.

295/70R1835x12.50R18Change
Diameter34.26″35.00″+0.74″+2.2%
Width11.61″12.50″+0.89″+7.6%
Sidewall8.13″8.50″+0.37″+4.6%
Circumference107.6″110.0″+2.3″+2.2%
Wheel18″18″Same
Revs per mile589576−12
SideTread
295/70R1835x12.50R18
Speedometer shows 60 mph61.3mph

Real speed on 35x12.50R18.

Ground clearance+0.37in

Change in height under the axle.

Width per side+0.44in

On the same wheel, split inboard and outboard.

Shop 35x12.50R18 tires

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295/70R18 or 35x12.50R18?

Can I use 35x12.50R18 instead of 295/70R18?

35x12.50R18 is 2.2% taller than 295/70R18. 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 35x12.50R18 you are really doing 61.3 mph if the speedometer was set up for 295/70R18. Going the other way, 295/70R18 would make it read 58.7 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.37 in (+9 mm) under the axle.

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