295/35R19 vs 305/35R19

305/35R19 is 0.28 in (7.0 mm) taller than 295/35R19, a +1.02% diameter difference. With the speedometer set for 295/35R19, an indicated 60 mph is 60.6 mph on 305/35R19.

Is this a safe swap?

Diameter difference +1.02%: within the ±3% guideline

By overall diameter alone, 305/35R19 falls inside the ±3% range commonly used as a guideline when replacing 295/35R19. 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.

295/35R19 vs 305/35R19 differences
Measurement	295/35R19	305/35R19	Difference	% diff
Overall diameter	27.13 in (689.1 mm)	27.41 in (696.1 mm)	+0.28 in (+7.0 mm)	+1.02%
Sidewall height	4.06 in (103.3 mm)	4.20 in (106.8 mm)	+0.14 in (+3.5 mm)	+3.39%
Section width	11.61 in (295.0 mm)	12.01 in (305.0 mm)	+0.39 in (+10.0 mm)	+3.39%
Circumference	85.23 in (2,164.9 mm)	86.10 in (2,186.9 mm)	+0.87 in (+22.0 mm)	+1.02%
Revolutions per mile	743	736	−7	−1.01%

True speed with the speedometer calibrated for 295/35R19
Indicated	Actual on 295/35R19	Actual on 305/35R19	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: 305/35R19 raises the vehicle by 0.14 in (3.5 mm) at the axle (half the +7.0 mm diameter difference).

305/35R19 is 0.28 in taller than 295/35R19 and 10 mm wider, a 1.02% difference in overall diameter.

With the speedometer calibrated for 295/35R19, an indicated 60 mph is actually 60.6 mph on 305/35R19, and revolutions per mile change from 743 to 736.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 295/35R19

Other comparisons with 305/35R19

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