TireSizesFinder

295/40R19 vs 295/35R20

295/35R20 is 0.16 in (4.1 mm) shorter than 295/40R19, a −0.57% diameter difference. With the speedometer set for 295/40R19, an indicated 60 mph is 59.7 mph on 295/35R20.

Is this a safe swap?

Diameter difference −0.57%: under 1%

By overall diameter alone, 295/35R20 is a near match for 295/40R19; 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: 295/40R19 (28.29 in) vs 295/35R20 (28.13 in)295/40R1928.29 in × 11.61 in295/35R2028.13 in × 11.61 in
Side profile and tread width, drawn to the same scale.
295/40R19 vs 295/35R20 differences
Measurement295/40R19295/35R20Difference% diff
Overall diameter28.29 in (718.6 mm)28.13 in (714.5 mm)−0.16 in (−4.1 mm)−0.57%
Sidewall height4.65 in (118.0 mm)4.06 in (103.3 mm)−0.58 in (−14.7 mm)−12.50%
Section width11.61 in (295.0 mm)11.61 in (295.0 mm)0.00 in (0.0 mm)0.00%
Circumference88.88 in (2,257.5 mm)88.37 in (2,244.7 mm)−0.51 in (−12.9 mm)−0.57%
Revolutions per mile713717+4+0.57%
True speed with the speedometer calibrated for 295/40R19
IndicatedActual on 295/40R19Actual on 295/35R20Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.7 mph−0.3 mph
75 mph75.0 mph74.6 mph−0.4 mph

Ride-height change: 295/35R20 lowers the vehicle by 0.08 in (2.0 mm) at the axle (half the −4.1 mm diameter difference).

295/35R20 is 0.16 in shorter than 295/40R19 and the same width, a 0.57% difference in overall diameter.

With the speedometer calibrated for 295/40R19, an indicated 60 mph is actually 59.7 mph on 295/35R20, and revolutions per mile change from 713 to 717.

295/35R20 mounts on a 20-inch wheel, a plus-1 fitment from the 19-inch wheel of 295/40R19.

Size pages

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