TireSizesFinder

255/55R19 vs 265/55R19

265/55R19 is 0.43 in (11.0 mm) taller than 255/55R19, a +1.44% diameter difference. With the speedometer set for 255/55R19, an indicated 60 mph is 60.9 mph on 265/55R19.

Is this a safe swap?

Diameter difference +1.44%: within the ±3% guideline

By overall diameter alone, 265/55R19 falls inside the ±3% range commonly used as a guideline when replacing 255/55R19. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 255/55R19 (30.04 in) vs 265/55R19 (30.48 in)255/55R1930.04 in × 10.04 in265/55R1930.48 in × 10.43 in
Side profile and tread width, drawn to the same scale.
255/55R19 vs 265/55R19 differences
Measurement255/55R19265/55R19Difference% diff
Overall diameter30.04 in (763.1 mm)30.48 in (774.1 mm)+0.43 in (+11.0 mm)+1.44%
Sidewall height5.52 in (140.3 mm)5.74 in (145.8 mm)+0.22 in (+5.5 mm)+3.92%
Section width10.04 in (255.0 mm)10.43 in (265.0 mm)+0.39 in (+10.0 mm)+3.92%
Circumference94.38 in (2,397.3 mm)95.74 in (2,431.9 mm)+1.36 in (+34.6 mm)+1.44%
Revolutions per mile671662−10−1.42%
True speed with the speedometer calibrated for 255/55R19
IndicatedActual on 255/55R19Actual on 265/55R19Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.9 mph+0.9 mph
75 mph75.0 mph76.1 mph+1.1 mph

Ride-height change: 265/55R19 raises the vehicle by 0.22 in (5.5 mm) at the axle (half the +11.0 mm diameter difference).

265/55R19 is 0.43 in taller than 255/55R19 and 10 mm wider, a 1.44% difference in overall diameter.

With the speedometer calibrated for 255/55R19, an indicated 60 mph is actually 60.9 mph on 265/55R19, and revolutions per mile change from 671 to 662.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 255/55R19

Other comparisons with 265/55R19

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