tireheight.com

225/35R20 in inches

A 225/35R20 tire is 26.2″ tall and 8.9″ wide, and fits a 20″ wheel. In inches it is written 26.2×8.9R20.

Diameter26.20″
Width8.86″
Sidewall3.10″
225/35R20 drawn to scale: 26.20 inch diameter, 3.10 inch sidewall, 20 inch wheel, 8.86 inch tread width20″ wheel3.10″26.20″ overall8.86″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 225/35R20 tires really are

Heights published by Michelin and Toyo for all 3 tires in this size. Their published revolutions per mile work out to 25.4–25.5″ under load (below).

Real 225/35R20 tires measure 26.20–26.22″, against 26.20″ from the size code. They run both taller and shorter than the size code.

Height under load25.4–25.5″

Published revs per mile (792–793) mean the tire rolls like a 25.4–25.5″ tire on the vehicle. Use this for speedometer calibration.

Weight spread22.0–24.0 lb

The lightest (Toyo Extensa HP II, XL) is 2.0 lb lighter per corner than the heaviest (Michelin Pilot Sport 4 S, XL).

3 tires in 225/35R20

Sort by the spec you care about.

LoadRevs/miSource
Toyo Extensa HP IIPerformanceXL · 90W26.2222.09.31,323792Spec page
Michelin Pilot Sport 4 SPerformanceXL · 90(Y)26.2023.29.51,323793Spec page
Michelin Pilot Sport 4 SPerformanceXL · 90Y26.2024.09.51,323793Spec page

Is 225/35R20 a 26-inch tire?

≈26″

Yes. The size code works out to 26.20″, and the 3 tires here publish 26.20–26.22″, so people call it a 26.

Compare with nearby sizes

Differences in overall diameter, calculated from each size code.

SizeDiameter ″vs 225/35R20Difference
245/30R2025.79-0.41″-1.6%
295/25R2025.81-0.39″-1.5%
305/25R2026.00-0.20″-0.8%
255/30R2026.02-0.18″-0.7%
265/30R2026.26+0.06″+0.2%
325/25R2026.40+0.20″+0.8%
235/35R2026.48+0.28″+1.1%
275/30R2026.50+0.30″+1.1%
335/25R2026.59+0.39″+1.5%
285/30R2026.73+0.53″+2.0%

How to read 225/35R20

How to read any tire size

225/35R20 90Y as printed on the tire sidewall, with each part numbered225/35R20 90Y123456
How 225/35R20 90Y is printed on the sidewall. It's the most common code among the 3 tires here (1 of them); tires in this size come in other load and speed ratings too.
1225Section width

225 mm across the widest point, or 8.86 inches. Every 225 size

235Aspect ratio

A percentage, not a measurement: the sidewall is 35% as tall as the tire is wide, which is 78.8 mm or 3.10 inches.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 7.5″ to 9.0″.

590Load index

Each tire carries up to 1,323 lb (600 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter26.20666 mm
Section width8.86225 mm
Sidewall height3.1078.8 mm
Circumference82.32,091 mm
Revolutions per mile (calculated, unloaded)769.8478 per km
Revolutions per mile (published by manufacturers)792–793492–493 per km
Approved wheel width7.5–9.0191–229 mm

Speedometer error after switching to 225/35R20

Your actual speed– mph

Questions about 225/35R20

What is 225/35R20 in inches?

26.20 inches tall, 8.86 inches wide, on a 20-inch wheel. Written in inches, that is roughly 26.2×8.9R20.

How much does a 225/35R20 tire weigh?

Between 22.0 lb and 24.0 lb for the 3 tires listed here. The lightest is the Toyo Extensa HP II (XL); the heaviest is the Michelin Pilot Sport 4 S (XL).

What wheel width do I need for 225/35R20?

Manufacturers approve 7.5–9.0″ wide wheels for this size.

How many revolutions per mile does a 225/35R20 make?

Published figures run 792–793 revolutions per mile. The calculated figure is 769.8, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 225/35R20 than 255/30R20?

0.18 inches taller on paper (26.20″ vs 26.02″), which raises the axle about 0.09″. Your speedometer will read about 0.7% slow.