265/55R19 vs 275/55R19

275/55R19 is 0.43 in (11.0 mm) taller than 265/55R19, a +1.42% diameter difference. With the speedometer set for 265/55R19, an indicated 60 mph is 60.9 mph on 275/55R19.

Is this a safe swap?

Diameter difference +1.42%: within the ±3% guideline

By overall diameter alone, 275/55R19 falls inside the ±3% range commonly used as a guideline when replacing 265/55R19. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

265/55R19 vs 275/55R19 differences
Measurement	265/55R19	275/55R19	Difference	% diff
Overall diameter	30.48 in (774.1 mm)	30.91 in (785.1 mm)	+0.43 in (+11.0 mm)	+1.42%
Sidewall height	5.74 in (145.8 mm)	5.95 in (151.3 mm)	+0.22 in (+5.5 mm)	+3.77%
Section width	10.43 in (265.0 mm)	10.83 in (275.0 mm)	+0.39 in (+10.0 mm)	+3.77%
Circumference	95.74 in (2,431.9 mm)	97.10 in (2,466.5 mm)	+1.36 in (+34.6 mm)	+1.42%
Revolutions per mile	662	652	−9	−1.40%

True speed with the speedometer calibrated for 265/55R19
Indicated	Actual on 265/55R19	Actual on 275/55R19	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.9 mph	+0.9 mph
75 mph	75.0 mph	76.1 mph	+1.1 mph

Ride-height change: 275/55R19 raises the vehicle by 0.22 in (5.5 mm) at the axle (half the +11.0 mm diameter difference).

275/55R19 is 0.43 in taller than 265/55R19 and 10 mm wider, a 1.42% difference in overall diameter.

With the speedometer calibrated for 265/55R19, an indicated 60 mph is actually 60.9 mph on 275/55R19, and revolutions per mile change from 662 to 652.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 265/55R19

Other comparisons with 275/55R19

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.