TireSizesFinder

275/65R17 vs 255/60R19

255/60R19 is 0.03 in (0.7 mm) shorter than 275/65R17, a −0.09% diameter difference. With the speedometer set for 275/65R17, an indicated 60 mph is 59.9 mph on 255/60R19.

Is this a safe swap?

Diameter difference −0.09%: under 1%

By overall diameter alone, 255/60R19 is a near match for 275/65R17; 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: 275/65R17 (31.07 in) vs 255/60R19 (31.05 in)275/65R1731.07 in × 10.83 in255/60R1931.05 in × 10.04 in
Side profile and tread width, drawn to the same scale.
275/65R17 vs 255/60R19 differences
Measurement275/65R17255/60R19Difference% diff
Overall diameter31.07 in (789.3 mm)31.05 in (788.6 mm)−0.03 in (−0.7 mm)−0.09%
Sidewall height7.04 in (178.8 mm)6.02 in (153.0 mm)−1.01 in (−25.7 mm)−14.41%
Section width10.83 in (275.0 mm)10.04 in (255.0 mm)−0.79 in (−20.0 mm)−7.27%
Circumference97.62 in (2,479.7 mm)97.54 in (2,477.5 mm)−0.09 in (−2.2 mm)−0.09%
Revolutions per mile649650+1+0.09%
True speed with the speedometer calibrated for 275/65R17
IndicatedActual on 275/65R17Actual on 255/60R19Difference
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: 255/60R19 lowers the vehicle by 0.01 in (0.4 mm) at the axle (half the −0.7 mm diameter difference).

255/60R19 is 0.03 in shorter than 275/65R17 and 20 mm narrower, a 0.09% difference in overall diameter.

With the speedometer calibrated for 275/65R17, an indicated 60 mph is actually 59.9 mph on 255/60R19, and revolutions per mile change from 649 to 650.

255/60R19 mounts on a 19-inch wheel, a plus-2 fitment from the 17-inch wheel of 275/65R17.

Size pages

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