TireSizesFinder

245/55R19 vs 275/50R19

275/50R19 is 0.22 in (5.5 mm) taller than 245/55R19, a +0.73% diameter difference. With the speedometer set for 245/55R19, an indicated 60 mph is 60.4 mph on 275/50R19.

Is this a safe swap?

Diameter difference +0.73%: under 1%

By overall diameter alone, 275/50R19 is a near match for 245/55R19; 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: 245/55R19 (29.61 in) vs 275/50R19 (29.83 in)245/55R1929.61 in × 9.65 in275/50R1929.83 in × 10.83 in
Side profile and tread width, drawn to the same scale.
245/55R19 vs 275/50R19 differences
Measurement245/55R19275/50R19Difference% diff
Overall diameter29.61 in (752.1 mm)29.83 in (757.6 mm)+0.22 in (+5.5 mm)+0.73%
Sidewall height5.31 in (134.8 mm)5.41 in (137.5 mm)+0.11 in (+2.8 mm)+2.04%
Section width9.65 in (245.0 mm)10.83 in (275.0 mm)+1.18 in (+30.0 mm)+12.24%
Circumference93.02 in (2,362.8 mm)93.70 in (2,380.1 mm)+0.68 in (+17.3 mm)+0.73%
Revolutions per mile681676−5−0.73%
True speed with the speedometer calibrated for 245/55R19
IndicatedActual on 245/55R19Actual on 275/50R19Difference
30 mph30.0 mph30.2 mph+0.2 mph
60 mph60.0 mph60.4 mph+0.4 mph
75 mph75.0 mph75.5 mph+0.5 mph

Ride-height change: 275/50R19 raises the vehicle by 0.11 in (2.8 mm) at the axle (half the +5.5 mm diameter difference).

275/50R19 is 0.22 in taller than 245/55R19 and 30 mm wider, a 0.73% difference in overall diameter.

With the speedometer calibrated for 245/55R19, an indicated 60 mph is actually 60.4 mph on 275/50R19, and revolutions per mile change from 681 to 676.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 245/55R19

Other comparisons with 275/50R19

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