tireheight.com

335/30R20 in inches

A 335/30R20 tire is 27.9″ tall and 13.2″ wide, and fits a 20″ wheel. In inches it is written 27.9×13.2R20.

Diameter27.91″
Width13.19″
Sidewall3.96″
335/30R20 drawn to scale: 27.91 inch diameter, 3.96 inch sidewall, 20 inch wheel, 13.19 inch tread width20″ wheel3.96″27.91″ overall13.19″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 335/30R20 tires really are

Heights published by Michelin for all 4 tires in this size. Their published revolutions per mile work out to 27.1″ under load (below).

Real 335/30R20 tires measure 28.00″, against 27.91″ from the size code. Every one runs taller than the size code.

Height under load27.1″

Published revs per mile (744) mean the tire rolls like a 27.1″ tire on the vehicle. Use this for speedometer calibration.

Weight spread30.8–31.6 lb

The lightest (Michelin Pilot Sport Cup 2 Connect, XL) is 0.8 lb lighter per corner than the heaviest (Michelin Pilot Sport Cup 2 R, XL).

4 tires in 335/30R20

Sort by the spec you care about.

LoadRevs/miSource
Michelin Pilot Sport Cup 2 ConnectPerformanceXL · 108(Y)28.0030.87.22,205744Spec page
Michelin Pilot Sport Cup 2 RPerformanceXL · 108(Y)28.0031.25.52,205744Spec page
Michelin Pilot Sport Cup 2 RPerformanceXL · 108(Y)28.0031.25.52,205744Spec page
Michelin Pilot Sport Cup 2 RPerformanceXL · 108(Y)28.0031.65.52,205744Spec page

Is 335/30R20 a 28-inch tire?

≈28″

Yes. The size code works out to 27.91″, and the 4 tires here publish 28.00″, so people call it a 28.

All 28-inch tire sizes, on every wheel size.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 335/30R20Difference
275/35R2027.58-0.33″-1.2%
215/45R2027.62-0.30″-1.1%
325/30R2027.68-0.24″-0.8%
245/40R2027.72-0.20″-0.7%
285/35R2027.85-0.06″-0.2%
255/40R2028.03+0.12″+0.4%
295/35R2028.13+0.22″+0.8%
345/30R2028.15+0.24″+0.8%
235/45R2028.33+0.41″+1.5%
265/40R2028.35+0.43″+1.6%

How to read 335/30R20

How to read any tire size

335/30R20 108Y as printed on the tire sidewall, with each part numbered335/30R20 108Y123456
How 335/30R20 108Y is printed on the sidewall. It's the most common code among the 4 tires here; tires in this size come in other load and speed ratings too.
1335Section width

335 mm across the widest point, or 13.19 inches. Every 335 size

230Aspect ratio

A percentage, not a measurement: the sidewall is 30% as tall as the tire is wide, which is 100.5 mm or 3.96 inches.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 11.5″ to 12.5″.

5108Load index

Each tire carries up to 2,205 lb (1,000 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter27.91709 mm
Section width13.19335 mm
Sidewall height3.96100.5 mm
Circumference87.72,227 mm
Revolutions per mile (calculated, unloaded)722.5449 per km
Revolutions per mile (published by manufacturers)744462 per km
Approved wheel width11.5–12.5292–318 mm

Speedometer error after switching to 335/30R20

Your actual speed– mph

Questions about 335/30R20

What is 335/30R20 in inches?

27.91 inches tall, 13.19 inches wide, on a 20-inch wheel. Written in inches, that is roughly 27.9×13.2R20.

How much does a 335/30R20 tire weigh?

Between 30.8 lb and 31.6 lb for the 4 tires listed here. The lightest is the Michelin Pilot Sport Cup 2 Connect (XL); the heaviest is the Michelin Pilot Sport Cup 2 R (XL).

What wheel width do I need for 335/30R20?

Manufacturers approve 11.5–12.5″ wide wheels for this size.

How many revolutions per mile does a 335/30R20 make?

Published figures run 744 revolutions per mile. The calculated figure is 722.5, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 335/30R20 than 285/35R20?

0.06 inches taller on paper (27.91″ vs 27.85″), which raises the axle about 0.03″. Your speedometer will read about 0.2% slow.