255/35R19 vs 265/35R19

265/35R19 is 0.28 in (7.0 mm) taller than 255/35R19, a +1.06% diameter difference. With the speedometer set for 255/35R19, an indicated 60 mph is 60.6 mph on 265/35R19.

Is this a safe swap?

Diameter difference +1.06%: within the ±3% guideline

By overall diameter alone, 265/35R19 falls inside the ±3% range commonly used as a guideline when replacing 255/35R19. 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.

255/35R19 vs 265/35R19 differences
Measurement	255/35R19	265/35R19	Difference	% diff
Overall diameter	26.03 in (661.1 mm)	26.30 in (668.1 mm)	+0.28 in (+7.0 mm)	+1.06%
Sidewall height	3.51 in (89.3 mm)	3.65 in (92.8 mm)	+0.14 in (+3.5 mm)	+3.92%
Section width	10.04 in (255.0 mm)	10.43 in (265.0 mm)	+0.39 in (+10.0 mm)	+3.92%
Circumference	81.77 in (2,076.9 mm)	82.63 in (2,098.9 mm)	+0.87 in (+22.0 mm)	+1.06%
Revolutions per mile	775	767	−8	−1.05%

True speed with the speedometer calibrated for 255/35R19
Indicated	Actual on 255/35R19	Actual on 265/35R19	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.6 mph	+0.6 mph
75 mph	75.0 mph	75.8 mph	+0.8 mph

Ride-height change: 265/35R19 raises the vehicle by 0.14 in (3.5 mm) at the axle (half the +7.0 mm diameter difference).

265/35R19 is 0.28 in taller than 255/35R19 and 10 mm wider, a 1.06% difference in overall diameter.

With the speedometer calibrated for 255/35R19, an indicated 60 mph is actually 60.6 mph on 265/35R19, and revolutions per mile change from 775 to 767.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 255/35R19

Other comparisons with 265/35R19

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