TireSizesFinder

31x10.50R16 vs 245/75R17

245/75R17 is 0.47 in (11.9 mm) taller than 31x10.50R16, a +1.51% diameter difference. With the speedometer set for 31x10.50R16, an indicated 60 mph is 60.9 mph on 245/75R17.

Is this a safe swap?

Diameter difference +1.51%: within the ±3% guideline

By overall diameter alone, 245/75R17 falls inside the ±3% range commonly used as a guideline when replacing 31x10.50R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 31x10.50R16 (31.00 in) vs 245/75R17 (31.47 in)31x10.50R1631.00 in × 10.50 in245/75R1731.47 in × 9.65 in
Side profile and tread width, drawn to the same scale.
31x10.50R16 vs 245/75R17 differences
Measurement31x10.50R16245/75R17Difference% diff
Overall diameter31.00 in (787.4 mm)31.47 in (799.3 mm)+0.47 in (+11.9 mm)+1.51%
Sidewall height7.50 in (190.5 mm)7.23 in (183.8 mm)−0.27 in (−6.7 mm)−3.54%
Section width10.50 in (266.7 mm)9.65 in (245.0 mm)−0.85 in (−21.7 mm)−8.14%
Circumference97.39 in (2,473.7 mm)98.86 in (2,511.1 mm)+1.47 in (+37.4 mm)+1.51%
Revolutions per mile651641−10−1.49%
True speed with the speedometer calibrated for 31x10.50R16
IndicatedActual on 31x10.50R16Actual on 245/75R17Difference
30 mph30.0 mph30.5 mph+0.5 mph
60 mph60.0 mph60.9 mph+0.9 mph
75 mph75.0 mph76.1 mph+1.1 mph

Ride-height change: 245/75R17 raises the vehicle by 0.23 in (5.9 mm) at the axle (half the +11.9 mm diameter difference).

245/75R17 is 0.47 in taller than 31x10.50R16 and 22 mm narrower, a 1.51% difference in overall diameter.

With the speedometer calibrated for 31x10.50R16, an indicated 60 mph is actually 60.9 mph on 245/75R17, and revolutions per mile change from 651 to 641.

245/75R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 31x10.50R16.

Size pages

Other comparisons with 31x10.50R16

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