TireSizesFinder

315/75R16 vs 35x12.50R17

35x12.50R17 is 0.40 in (10.1 mm) taller than 315/75R16, a +1.15% diameter difference. With the speedometer set for 315/75R16, an indicated 60 mph is 60.7 mph on 35x12.50R17.

Is this a safe swap?

Diameter difference +1.15%: within the ±3% guideline

By overall diameter alone, 35x12.50R17 falls inside the ±3% range commonly used as a guideline when replacing 315/75R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 315/75R16 (34.60 in) vs 35x12.50R17 (35.00 in)315/75R1634.60 in × 12.40 in35x12.50R1735.00 in × 12.50 in
Side profile and tread width, drawn to the same scale.
315/75R16 vs 35x12.50R17 differences
Measurement315/75R1635x12.50R17Difference% diff
Overall diameter34.60 in (878.9 mm)35.00 in (889.0 mm)+0.40 in (+10.1 mm)+1.15%
Sidewall height9.30 in (236.3 mm)9.00 in (228.6 mm)−0.30 in (−7.7 mm)−3.24%
Section width12.40 in (315.0 mm)12.50 in (317.5 mm)+0.10 in (+2.5 mm)+0.79%
Circumference108.71 in (2,761.1 mm)109.96 in (2,792.9 mm)+1.25 in (+31.7 mm)+1.15%
Revolutions per mile583576−7−1.14%
True speed with the speedometer calibrated for 315/75R16
IndicatedActual on 315/75R16Actual on 35x12.50R17Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.7 mph+0.7 mph
75 mph75.0 mph75.9 mph+0.9 mph

Ride-height change: 35x12.50R17 raises the vehicle by 0.20 in (5.1 mm) at the axle (half the +10.1 mm diameter difference).

35x12.50R17 is 0.40 in taller than 315/75R16 and 3 mm wider, a 1.15% difference in overall diameter.

With the speedometer calibrated for 315/75R16, an indicated 60 mph is actually 60.7 mph on 35x12.50R17, and revolutions per mile change from 583 to 576.

35x12.50R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 315/75R16.

Size pages

Other comparisons with 315/75R16

Other comparisons with 35x12.50R17

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.