TireSizesFinder

35x12.50R15 vs 315/75R16

315/75R16 is 0.40 in (10.1 mm) shorter than 35x12.50R15, a −1.14% diameter difference. With the speedometer set for 35x12.50R15, an indicated 60 mph is 59.3 mph on 315/75R16.

Is this a safe swap?

Diameter difference −1.14%: within the ±3% guideline

By overall diameter alone, 315/75R16 falls inside the ±3% range commonly used as a guideline when replacing 35x12.50R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 35x12.50R15 (35.00 in) vs 315/75R16 (34.60 in)35x12.50R1535.00 in × 12.50 in315/75R1634.60 in × 12.40 in
Side profile and tread width, drawn to the same scale.
35x12.50R15 vs 315/75R16 differences
Measurement35x12.50R15315/75R16Difference% diff
Overall diameter35.00 in (889.0 mm)34.60 in (878.9 mm)−0.40 in (−10.1 mm)−1.14%
Sidewall height10.00 in (254.0 mm)9.30 in (236.3 mm)−0.70 in (−17.7 mm)−6.99%
Section width12.50 in (317.5 mm)12.40 in (315.0 mm)−0.10 in (−2.5 mm)−0.79%
Circumference109.96 in (2,792.9 mm)108.71 in (2,761.1 mm)−1.25 in (−31.7 mm)−1.14%
Revolutions per mile576583+7+1.15%
True speed with the speedometer calibrated for 35x12.50R15
IndicatedActual on 35x12.50R15Actual on 315/75R16Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.3 mph−0.7 mph
75 mph75.0 mph74.1 mph−0.9 mph

Ride-height change: 315/75R16 lowers the vehicle by 0.20 in (5.1 mm) at the axle (half the −10.1 mm diameter difference).

315/75R16 is 0.40 in shorter than 35x12.50R15 and 3 mm narrower, a 1.14% difference in overall diameter.

With the speedometer calibrated for 35x12.50R15, an indicated 60 mph is actually 59.3 mph on 315/75R16, and revolutions per mile change from 576 to 583.

315/75R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 35x12.50R15.

Size pages

Other comparisons with 35x12.50R15

Other comparisons with 315/75R16

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