TireSizesFinder

245/75R16 vs 31x10.50R16

31x10.50R16 is 0.53 in (13.5 mm) taller than 245/75R16, a +1.74% diameter difference. With the speedometer set for 245/75R16, an indicated 60 mph is 61.0 mph on 31x10.50R16.

Is this a safe swap?

Diameter difference +1.74%: within the ±3% guideline

By overall diameter alone, 31x10.50R16 falls inside the ±3% range commonly used as a guideline when replacing 245/75R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 245/75R16 (30.47 in) vs 31x10.50R16 (31.00 in)245/75R1630.47 in × 9.65 in31x10.50R1631.00 in × 10.50 in
Side profile and tread width, drawn to the same scale.
245/75R16 vs 31x10.50R16 differences
Measurement245/75R1631x10.50R16Difference% diff
Overall diameter30.47 in (773.9 mm)31.00 in (787.4 mm)+0.53 in (+13.5 mm)+1.74%
Sidewall height7.23 in (183.8 mm)7.50 in (190.5 mm)+0.27 in (+6.8 mm)+3.67%
Section width9.65 in (245.0 mm)10.50 in (266.7 mm)+0.85 in (+21.7 mm)+8.86%
Circumference95.72 in (2,431.3 mm)97.39 in (2,473.7 mm)+1.67 in (+42.4 mm)+1.74%
Revolutions per mile662651−11−1.71%
True speed with the speedometer calibrated for 245/75R16
IndicatedActual on 245/75R16Actual on 31x10.50R16Difference
30 mph30.0 mph30.5 mph+0.5 mph
60 mph60.0 mph61.0 mph+1.0 mph
75 mph75.0 mph76.3 mph+1.3 mph

Ride-height change: 31x10.50R16 raises the vehicle by 0.27 in (6.8 mm) at the axle (half the +13.5 mm diameter difference).

31x10.50R16 is 0.53 in taller than 245/75R16 and 22 mm wider, a 1.74% difference in overall diameter.

With the speedometer calibrated for 245/75R16, an indicated 60 mph is actually 61.0 mph on 31x10.50R16, and revolutions per mile change from 662 to 651.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 245/75R16

Other comparisons with 31x10.50R16

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