TireSizesFinder

275/30R19 vs 245/35R19

245/35R19 is 0.26 in (6.5 mm) taller than 275/30R19, a +1.00% diameter difference. With the speedometer set for 275/30R19, an indicated 60 mph is 60.6 mph on 245/35R19.

Is this a safe swap?

Diameter difference +1.00%: within the ±3% guideline

By overall diameter alone, 245/35R19 falls inside the ±3% range commonly used as a guideline when replacing 275/30R19. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 275/30R19 (25.50 in) vs 245/35R19 (25.75 in)275/30R1925.50 in × 10.83 in245/35R1925.75 in × 9.65 in
Side profile and tread width, drawn to the same scale.
275/30R19 vs 245/35R19 differences
Measurement275/30R19245/35R19Difference% diff
Overall diameter25.50 in (647.6 mm)25.75 in (654.1 mm)+0.26 in (+6.5 mm)+1.00%
Sidewall height3.25 in (82.5 mm)3.38 in (85.8 mm)+0.13 in (+3.3 mm)+3.94%
Section width10.83 in (275.0 mm)9.65 in (245.0 mm)−1.18 in (−30.0 mm)−10.91%
Circumference80.10 in (2,034.5 mm)80.90 in (2,054.9 mm)+0.80 in (+20.4 mm)+1.00%
Revolutions per mile791783−8−0.99%
True speed with the speedometer calibrated for 275/30R19
IndicatedActual on 275/30R19Actual on 245/35R19Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.6 mph+0.6 mph
75 mph75.0 mph75.8 mph+0.8 mph

Ride-height change: 245/35R19 raises the vehicle by 0.13 in (3.3 mm) at the axle (half the +6.5 mm diameter difference).

245/35R19 is 0.26 in taller than 275/30R19 and 30 mm narrower, a 1.00% difference in overall diameter.

With the speedometer calibrated for 275/30R19, an indicated 60 mph is actually 60.6 mph on 245/35R19, and revolutions per mile change from 791 to 783.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 275/30R19

Other comparisons with 245/35R19

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