225/50R17 vs 245/35R19

245/35R19 is 0.11 in (2.7 mm) shorter than 225/50R17, a −0.41% diameter difference. With the speedometer set for 225/50R17, an indicated 60 mph is 59.8 mph on 245/35R19.

Is this a safe swap?

Diameter difference −0.41%: under 1%

By overall diameter alone, 245/35R19 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.

Side profile and tread width, drawn to the same scale.

225/50R17 vs 245/35R19 differences
Measurement	225/50R17	245/35R19	Difference	% diff
Overall diameter	25.86 in (656.8 mm)	25.75 in (654.1 mm)	−0.11 in (−2.7 mm)	−0.41%
Sidewall height	4.43 in (112.5 mm)	3.38 in (85.8 mm)	−1.05 in (−26.7 mm)	−23.78%
Section width	8.86 in (225.0 mm)	9.65 in (245.0 mm)	+0.79 in (+20.0 mm)	+8.89%
Circumference	81.24 in (2,063.4 mm)	80.90 in (2,054.9 mm)	−0.33 in (−8.5 mm)	−0.41%
Revolutions per mile	780	783	+3	+0.41%

True speed with the speedometer calibrated for 225/50R17
Indicated	Actual on 225/50R17	Actual on 245/35R19	Difference
30 mph	30.0 mph	29.9 mph	−0.1 mph
60 mph	60.0 mph	59.8 mph	−0.2 mph
75 mph	75.0 mph	74.7 mph	−0.3 mph

Ride-height change: 245/35R19 lowers the vehicle by 0.05 in (1.4 mm) at the axle (half the −2.7 mm diameter difference).

245/35R19 is 0.11 in shorter than 225/50R17 and 20 mm wider, a 0.41% difference in overall diameter.

With the speedometer calibrated for 225/50R17, an indicated 60 mph is actually 59.8 mph on 245/35R19, and revolutions per mile change from 780 to 783.

245/35R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 225/50R17.

Size pages

Other comparisons with 225/50R17

Other comparisons with 245/35R19

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.