TireSizesFinder

245/70R17 vs 265/55R19

265/55R19 is 0.03 in (0.7 mm) shorter than 245/70R17, a −0.09% diameter difference. With the speedometer set for 245/70R17, an indicated 60 mph is 59.9 mph on 265/55R19.

Is this a safe swap?

Diameter difference −0.09%: under 1%

By overall diameter alone, 265/55R19 is a near match for 245/70R17; 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: 245/70R17 (30.50 in) vs 265/55R19 (30.48 in)245/70R1730.50 in × 9.65 in265/55R1930.48 in × 10.43 in
Side profile and tread width, drawn to the same scale.
245/70R17 vs 265/55R19 differences
Measurement245/70R17265/55R19Difference% diff
Overall diameter30.50 in (774.8 mm)30.48 in (774.1 mm)−0.03 in (−0.7 mm)−0.09%
Sidewall height6.75 in (171.5 mm)5.74 in (145.8 mm)−1.01 in (−25.7 mm)−15.01%
Section width9.65 in (245.0 mm)10.43 in (265.0 mm)+0.79 in (+20.0 mm)+8.16%
Circumference95.83 in (2,434.1 mm)95.74 in (2,431.9 mm)−0.09 in (−2.2 mm)−0.09%
Revolutions per mile661662+1+0.09%
True speed with the speedometer calibrated for 245/70R17
IndicatedActual on 245/70R17Actual on 265/55R19Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph59.9 mph−0.1 mph
75 mph75.0 mph74.9 mph−0.1 mph

Ride-height change: 265/55R19 lowers the vehicle by 0.01 in (0.4 mm) at the axle (half the −0.7 mm diameter difference).

265/55R19 is 0.03 in shorter than 245/70R17 and 20 mm wider, a 0.09% difference in overall diameter.

With the speedometer calibrated for 245/70R17, an indicated 60 mph is actually 59.9 mph on 265/55R19, and revolutions per mile change from 661 to 662.

265/55R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 245/70R17.

Size pages

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