235/50R19 vs 295/35R20

295/35R20 is 0.12 in (3.1 mm) shorter than 235/50R19, a −0.43% diameter difference. With the speedometer set for 235/50R19, an indicated 60 mph is 59.7 mph on 295/35R20.

Is this a safe swap?

Diameter difference −0.43%: under 1%

By overall diameter alone, 295/35R20 is a near match for 235/50R19; the speedometer changes by less than 1%. 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.

235/50R19 vs 295/35R20 differences
Measurement	235/50R19	295/35R20	Difference	% diff
Overall diameter	28.25 in (717.6 mm)	28.13 in (714.5 mm)	−0.12 in (−3.1 mm)	−0.43%
Sidewall height	4.63 in (117.5 mm)	4.06 in (103.3 mm)	−0.56 in (−14.2 mm)	−12.13%
Section width	9.25 in (235.0 mm)	11.61 in (295.0 mm)	+2.36 in (+60.0 mm)	+25.53%
Circumference	88.76 in (2,254.4 mm)	88.37 in (2,244.7 mm)	−0.38 in (−9.7 mm)	−0.43%
Revolutions per mile	714	717	+3	+0.43%

True speed with the speedometer calibrated for 235/50R19
Indicated	Actual on 235/50R19	Actual on 295/35R20	Difference
30 mph	30.0 mph	29.9 mph	−0.1 mph
60 mph	60.0 mph	59.7 mph	−0.3 mph
75 mph	75.0 mph	74.7 mph	−0.3 mph

Ride-height change: 295/35R20 lowers the vehicle by 0.06 in (1.5 mm) at the axle (half the −3.1 mm diameter difference).

295/35R20 is 0.12 in shorter than 235/50R19 and 60 mm wider, a 0.43% difference in overall diameter.

With the speedometer calibrated for 235/50R19, an indicated 60 mph is actually 59.7 mph on 295/35R20, and revolutions per mile change from 714 to 717.

295/35R20 mounts on a 20-inch wheel, a plus-1 fitment from the 19-inch wheel of 235/50R19.

Size pages

Other comparisons with 235/50R19

Other comparisons with 295/35R20

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