TireSizesFinder

235/45R17 vs 225/35R19

225/35R19 is 0.13 in (3.2 mm) shorter than 235/45R17, a −0.50% diameter difference. With the speedometer set for 235/45R17, an indicated 60 mph is 59.7 mph on 225/35R19.

Is this a safe swap?

Diameter difference −0.50%: under 1%

By overall diameter alone, 225/35R19 is a near match for 235/45R17; 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: 235/45R17 (25.33 in) vs 225/35R19 (25.20 in)235/45R1725.33 in × 9.25 in225/35R1925.20 in × 8.86 in
Side profile and tread width, drawn to the same scale.
235/45R17 vs 225/35R19 differences
Measurement235/45R17225/35R19Difference% diff
Overall diameter25.33 in (643.3 mm)25.20 in (640.1 mm)−0.13 in (−3.2 mm)−0.50%
Sidewall height4.16 in (105.8 mm)3.10 in (78.8 mm)−1.06 in (−27.0 mm)−25.53%
Section width9.25 in (235.0 mm)8.86 in (225.0 mm)−0.39 in (−10.0 mm)−4.26%
Circumference79.57 in (2,021.0 mm)79.17 in (2,010.9 mm)−0.40 in (−10.1 mm)−0.50%
Revolutions per mile796800+4+0.50%
True speed with the speedometer calibrated for 235/45R17
IndicatedActual on 235/45R17Actual on 225/35R19Difference
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: 225/35R19 lowers the vehicle by 0.06 in (1.6 mm) at the axle (half the −3.2 mm diameter difference).

225/35R19 is 0.13 in shorter than 235/45R17 and 10 mm narrower, a 0.50% difference in overall diameter.

With the speedometer calibrated for 235/45R17, an indicated 60 mph is actually 59.7 mph on 225/35R19, and revolutions per mile change from 796 to 800.

225/35R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 235/45R17.

Size pages

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