335/25R20 tire size

A 335/25R20 tire is 26.59 inches (675.5 mm) tall, 13.19 in (335 mm) wide and fits a 20-inch wheel. In inch notation it is roughly a 26.6x13.2R20.

335/25R20 dimensions
Overall diameter26.59 in675.5 mm
Section width13.19 in335 mm
Sidewall height3.30 in83.8 mm
Circumference83.55 in2,122 mm
Revolutions758.4 per mile471.2 per km
Rim diameter20 in508.0 mm

Compare 335/25R20 with another size

Speed in

Overall diameter difference

+2.29%

60 mph on the speedometer = 61.4 mph actual

Within the ±3 % diameter range most tire fitters accept.

Ground clearance
+7.8 mm (+0.31 in)
Revolutions
758 → 741 per mile

335/25R20 305/30R20

Side-by-side dimensions

CurrentNewDifference%
Diameter26.59 in27.20 in+0.61 in+2.29%
Diameter675.5 mm691.0 mm+15.5 mm+2.29%
Width13.19 in12.01 in−1.18 in−8.96%
Width335.0 mm305.0 mm−30.0 mm−8.96%
Sidewall3.30 in3.60 in+0.31 in+9.25%
Sidewall83.8 mm91.5 mm+7.8 mm+9.25%
Circumference83.55 in85.47 in+1.92 in+2.29%
Revs per mile758.4 741.3 −17.0 −2.24%

Speedometer error

Speedometer showsActual speedDifference
20 mph20.5 mph+0.5 mph
30 mph30.7 mph+0.7 mph
40 mph40.9 mph+0.9 mph
50 mph51.1 mph+1.1 mph
60 mph61.4 mph+1.4 mph
70 mph71.6 mph+1.6 mph
80 mph81.8 mph+1.8 mph

Alternative sizes on the same 20-inch wheel

Sizes in use within ±3 % of the overall diameter of 335/25R20:

Plus and minus sizes for 335/25R20

SizeWheelDiameterDifference
335/30R18Minus 2 (18 in)25.91 in−2.56%
325/30R19Minus 1 (19 in)26.68 in+0.31%
305/30R19Minus 1 (19 in)26.20 in−1.47%

Vehicles approved with 335/25R20 tires

Models whose Swiss type approval lists 335/25R20 as a standard or optional size (15 approvals in total). Always check your own vehicle's placard or papers.

Source: Swiss Federal Roads Office (FEDRO/ASTRA), open government data. Original data (downloaded 2026-09-29). Data processed by us; errors in processing are ours, not the publisher's.

Nearby 20-inch sizes

Reading the 335/25R20 size

The load index and speed rating (for example 91V) follow the size on the sidewall. They must meet at least the values on your vehicle's tire placard.