TireSizesFinder

245/60R18 vs 265/50R19

265/50R19 is 0.14 in (3.6 mm) shorter than 245/60R18, a −0.48% diameter difference. With the speedometer set for 245/60R18, an indicated 60 mph is 59.7 mph on 265/50R19.

Is this a safe swap?

Diameter difference −0.48%: under 1%

By overall diameter alone, 265/50R19 is a near match for 245/60R18; 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: 245/60R18 (29.57 in) vs 265/50R19 (29.43 in)245/60R1829.57 in × 9.65 in265/50R1929.43 in × 10.43 in
Side profile and tread width, drawn to the same scale.
245/60R18 vs 265/50R19 differences
Measurement245/60R18265/50R19Difference% diff
Overall diameter29.57 in (751.2 mm)29.43 in (747.6 mm)−0.14 in (−3.6 mm)−0.48%
Sidewall height5.79 in (147.0 mm)5.22 in (132.5 mm)−0.57 in (−14.5 mm)−9.86%
Section width9.65 in (245.0 mm)10.43 in (265.0 mm)+0.79 in (+20.0 mm)+8.16%
Circumference92.91 in (2,360.0 mm)92.47 in (2,348.7 mm)−0.45 in (−11.3 mm)−0.48%
Revolutions per mile682685+3+0.48%
True speed with the speedometer calibrated for 245/60R18
IndicatedActual on 245/60R18Actual on 265/50R19Difference
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: 265/50R19 lowers the vehicle by 0.07 in (1.8 mm) at the axle (half the −3.6 mm diameter difference).

265/50R19 is 0.14 in shorter than 245/60R18 and 20 mm wider, a 0.48% difference in overall diameter.

With the speedometer calibrated for 245/60R18, an indicated 60 mph is actually 59.7 mph on 265/50R19, and revolutions per mile change from 682 to 685.

265/50R19 mounts on a 19-inch wheel, a plus-1 fitment from the 18-inch wheel of 245/60R18.

Size pages

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