TireSizesFinder

245/75R16 vs 225/75R17

225/75R17 is 0.18 in (4.6 mm) shorter than 245/75R16, a −0.59% diameter difference. With the speedometer set for 245/75R16, an indicated 60 mph is 59.6 mph on 225/75R17.

Is this a safe swap?

Diameter difference −0.59%: under 1%

By overall diameter alone, 225/75R17 is a near match for 245/75R16; the speedometer changes by less than 1%. 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 225/75R17 (30.29 in)245/75R1630.47 in × 9.65 in225/75R1730.29 in × 8.86 in
Side profile and tread width, drawn to the same scale.
245/75R16 vs 225/75R17 differences
Measurement245/75R16225/75R17Difference% diff
Overall diameter30.47 in (773.9 mm)30.29 in (769.3 mm)−0.18 in (−4.6 mm)−0.59%
Sidewall height7.23 in (183.8 mm)6.64 in (168.8 mm)−0.59 in (−15.0 mm)−8.16%
Section width9.65 in (245.0 mm)8.86 in (225.0 mm)−0.79 in (−20.0 mm)−8.16%
Circumference95.72 in (2,431.3 mm)95.15 in (2,416.8 mm)−0.57 in (−14.5 mm)−0.59%
Revolutions per mile662666+4+0.60%
True speed with the speedometer calibrated for 245/75R16
IndicatedActual on 245/75R16Actual on 225/75R17Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.6 mph−0.4 mph
75 mph75.0 mph74.6 mph−0.4 mph

Ride-height change: 225/75R17 lowers the vehicle by 0.09 in (2.3 mm) at the axle (half the −4.6 mm diameter difference).

225/75R17 is 0.18 in shorter than 245/75R16 and 20 mm narrower, a 0.59% difference in overall diameter.

With the speedometer calibrated for 245/75R16, an indicated 60 mph is actually 59.6 mph on 225/75R17, and revolutions per mile change from 662 to 666.

225/75R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 245/75R16.

Size pages

Other comparisons with 245/75R16

Other comparisons with 225/75R17

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