SidewallerTire & wheel calculators

315/70R17 vs 35x12.50R17

35x12.50R17 is 1.9% taller (+0.64 in) and 0.10 in wider than 315/70R17.

OK
Close match

35x12.50R17 is 1.9% taller than 315/70R17. That is inside the ±3% most shops treat as a straight swap.

315/70R1735x12.50R17Change
Diameter34.36″35.00″+0.64″+1.9%
Width12.40″12.50″+0.10″+0.8%
Sidewall8.68″9.00″+0.32″+3.7%
Circumference108.0″110.0″+2.0″+1.9%
Wheel17″17″Same
Revs per mile587576−11
SideTread
315/70R1735x12.50R17
Speedometer shows 60 mph61.1mph

Real speed on 35x12.50R17.

Ground clearance+0.32in

Change in height under the axle.

Width per side+0.05in

On the same wheel, split inboard and outboard.

Shop 35x12.50R17 tires

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315/70R17 or 35x12.50R17?

Can I use 35x12.50R17 instead of 315/70R17?

35x12.50R17 is 1.9% taller than 315/70R17. 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 35x12.50R17 you are really doing 61.1 mph if the speedometer was set up for 315/70R17. Going the other way, 315/70R17 would make it read 58.9 mph at a real 60.

How much ground clearance does it change?

Half the diameter difference: +0.32 in (+8 mm) under the axle.

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