TireSizesFinder

265/35R18 vs 225/35R19

225/35R19 is 0.10 in (2.6 mm) shorter than 265/35R18, a −0.40% diameter difference. With the speedometer set for 265/35R18, an indicated 60 mph is 59.8 mph on 225/35R19.

Is this a safe swap?

Diameter difference −0.40%: under 1%

By overall diameter alone, 225/35R19 is a near match for 265/35R18; 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: 265/35R18 (25.30 in) vs 225/35R19 (25.20 in)265/35R1825.30 in × 10.43 in225/35R1925.20 in × 8.86 in
Side profile and tread width, drawn to the same scale.
265/35R18 vs 225/35R19 differences
Measurement265/35R18225/35R19Difference% diff
Overall diameter25.30 in (642.7 mm)25.20 in (640.1 mm)−0.10 in (−2.6 mm)−0.40%
Sidewall height3.65 in (92.8 mm)3.10 in (78.8 mm)−0.55 in (−14.0 mm)−15.09%
Section width10.43 in (265.0 mm)8.86 in (225.0 mm)−1.57 in (−40.0 mm)−15.09%
Circumference79.49 in (2,019.1 mm)79.17 in (2,010.9 mm)−0.32 in (−8.2 mm)−0.40%
Revolutions per mile797800+3+0.41%
True speed with the speedometer calibrated for 265/35R18
IndicatedActual on 265/35R18Actual on 225/35R19Difference
30 mph30.0 mph29.9 mph−0.1 mph
60 mph60.0 mph59.8 mph−0.2 mph
75 mph75.0 mph74.7 mph−0.3 mph

Ride-height change: 225/35R19 lowers the vehicle by 0.05 in (1.3 mm) at the axle (half the −2.6 mm diameter difference).

225/35R19 is 0.10 in shorter than 265/35R18 and 40 mm narrower, a 0.40% difference in overall diameter.

With the speedometer calibrated for 265/35R18, an indicated 60 mph is actually 59.8 mph on 225/35R19, and revolutions per mile change from 797 to 800.

225/35R19 mounts on a 19-inch wheel, a plus-1 fitment from the 18-inch wheel of 265/35R18.

Size pages

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