TireSizesFinder

275/50R19 vs 275/55R19

275/55R19 is 1.08 in (27.5 mm) taller than 275/50R19, a +3.63% diameter difference. With the speedometer set for 275/50R19, an indicated 60 mph is 62.2 mph on 275/55R19.

Is this a safe swap?

Diameter difference +3.63%: outside the ±3% guideline

By overall diameter alone, 275/55R19 falls outside the ±3% range commonly used as a guideline when replacing 275/50R19; speedometer and ride-height changes are larger. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 275/50R19 (29.83 in) vs 275/55R19 (30.91 in)275/50R1929.83 in × 10.83 in275/55R1930.91 in × 10.83 in
Side profile and tread width, drawn to the same scale.
275/50R19 vs 275/55R19 differences
Measurement275/50R19275/55R19Difference% diff
Overall diameter29.83 in (757.6 mm)30.91 in (785.1 mm)+1.08 in (+27.5 mm)+3.63%
Sidewall height5.41 in (137.5 mm)5.95 in (151.3 mm)+0.54 in (+13.8 mm)+10.00%
Section width10.83 in (275.0 mm)10.83 in (275.0 mm)0.00 in (0.0 mm)0.00%
Circumference93.70 in (2,380.1 mm)97.10 in (2,466.5 mm)+3.40 in (+86.4 mm)+3.63%
Revolutions per mile676652−24−3.50%
True speed with the speedometer calibrated for 275/50R19
IndicatedActual on 275/50R19Actual on 275/55R19Difference
30 mph30.0 mph31.1 mph+1.1 mph
60 mph60.0 mph62.2 mph+2.2 mph
75 mph75.0 mph77.7 mph+2.7 mph

Ride-height change: 275/55R19 raises the vehicle by 0.54 in (13.8 mm) at the axle (half the +27.5 mm diameter difference).

275/55R19 is 1.08 in taller than 275/50R19 and the same width, a 3.63% difference in overall diameter.

With the speedometer calibrated for 275/50R19, an indicated 60 mph is actually 62.2 mph on 275/55R19, and revolutions per mile change from 676 to 652.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 275/50R19

Other comparisons with 275/55R19

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