TireSizesFinder

225/50R17 vs 285/30R19

285/30R19 is 0.13 in (3.2 mm) shorter than 225/50R17, a −0.49% diameter difference. With the speedometer set for 225/50R17, an indicated 60 mph is 59.7 mph on 285/30R19.

Is this a safe swap?

Diameter difference −0.49%: under 1%

By overall diameter alone, 285/30R19 is a near match for 225/50R17; 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: 225/50R17 (25.86 in) vs 285/30R19 (25.73 in)225/50R1725.86 in × 8.86 in285/30R1925.73 in × 11.22 in
Side profile and tread width, drawn to the same scale.
225/50R17 vs 285/30R19 differences
Measurement225/50R17285/30R19Difference% diff
Overall diameter25.86 in (656.8 mm)25.73 in (653.6 mm)−0.13 in (−3.2 mm)−0.49%
Sidewall height4.43 in (112.5 mm)3.37 in (85.5 mm)−1.06 in (−27.0 mm)−24.00%
Section width8.86 in (225.0 mm)11.22 in (285.0 mm)+2.36 in (+60.0 mm)+26.67%
Circumference81.24 in (2,063.4 mm)80.84 in (2,053.3 mm)−0.40 in (−10.1 mm)−0.49%
Revolutions per mile780784+4+0.49%
True speed with the speedometer calibrated for 225/50R17
IndicatedActual on 225/50R17Actual on 285/30R19Difference
30 mph30.0 mph29.9 mph−0.1 mph
60 mph60.0 mph59.7 mph−0.3 mph
75 mph75.0 mph74.6 mph−0.4 mph

Ride-height change: 285/30R19 lowers the vehicle by 0.06 in (1.6 mm) at the axle (half the −3.2 mm diameter difference).

285/30R19 is 0.13 in shorter than 225/50R17 and 60 mm wider, a 0.49% difference in overall diameter.

With the speedometer calibrated for 225/50R17, an indicated 60 mph is actually 59.7 mph on 285/30R19, and revolutions per mile change from 780 to 784.

285/30R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 225/50R17.

Size pages

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