tireheight.com

265/40R20 in inches

A 265/40R20 tire is 28.3″ tall and 10.4″ wide, and fits a 20″ wheel. In inches it is written 28.3×10.4R20.

Diameter28.35″
Width10.43″
Sidewall4.17″
265/40R20 drawn to scale: 28.35 inch diameter, 4.17 inch sidewall, 20 inch wheel, 10.43 inch tread width20″ wheel4.17″28.35″ overall10.43″ wideSide view
Drawn to scale. Nominal dimensions calculated from the size code.
Manufacturer data

How tall 265/40R20 tires really are

Heights published by Michelin and Toyo for all 14 tires in this size. Their published revolutions per mile work out to 27.5–27.6″ under load (below).

Real 265/40R20 tires measure 28.35–28.50″, against 28.35″ from the size code. They run both taller and shorter than the size code.

  1. Michelin Pilot Sport All-Season 4 · 228.40–28.50″ +0.15″
  2. Michelin Pilot Sport 4 S · 428.40″ +0.05″
  3. Michelin Pilot Sport EV · 328.40″ +0.05″
  4. Michelin Pilot Alpin 5 · 328.35″ +0.00″
  5. Michelin X-Ice Snow28.35″ +0.00″
  6. Toyo Observe G3-Ice28.35″ −0.00″
Each bar runs from the size code's 28.35″ (the orange line) to the model's published height. The track spans 1.0″. Where a model comes in several load ranges, the darker part shows its range of heights; the number after the name is how many versions it comes in.
Height under load27.5–27.6″

Published revs per mile (730–734) mean the tire rolls like a 27.5–27.6″ tire on the vehicle. Use this for speedometer calibration.

Weight spread28.3–33.3 lb

The lightest (Michelin Pilot Sport 4 S, XL) is 5.0 lb lighter per corner than the heaviest (Michelin X-Ice Snow, XL).

14 tires in 265/40R20

Sort by the spec you care about.

LoadRevs/miSource
Michelin Pilot Sport 4 SPerformanceXL · 104(Y)28.4028.39.01,984734Spec page
Michelin Pilot Sport EVPerformanceXL · 104H28.4028.48.51,984734Spec page
Michelin Pilot Sport 4 SPerformanceXL · 104Y28.4028.59.01,984734Spec page
Michelin Pilot Alpin 5WinterXL · 104H28.3528.79.51,984734Spec page
Michelin Pilot Sport 4 SPerformanceXL · 104(Y)28.4029.09.01,984734Spec page
Michelin Pilot Alpin 5WinterXL · 104W28.3529.19.51,984734Spec page
Michelin Pilot Sport EVPerformanceXL · 104Y28.4029.58.51,984734Spec page
Michelin Pilot Sport All-Season 4PerformanceXL · 104V28.4029.69.01,984734Spec page
Michelin Pilot Alpin 5WinterXL · 104W28.3529.89.51,984734Spec page
Michelin Pilot Sport 4 SPerformanceXL · 104(Y)28.4029.99.51,984734Spec page
Michelin Pilot Sport All-Season 4PerformanceXL · 104Y28.5030.310.01,984730Spec page
Michelin Pilot Sport EVPerformanceXL · 104Y28.4030.48.01,984734Spec page
Toyo Observe G3-IceWinterXL · 104T28.3532.811.31,984733Spec page
Michelin X-Ice SnowWinterXL · 104H28.3533.310.51,984734Spec page

Is 265/40R20 a 28-inch tire?

≈28″

Close. The size code works out to 28.35″, and the 14 tires here publish 28.35–28.50″, 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 265/40R20Difference
285/35R2027.85-0.49″-1.7%
335/30R2027.91-0.43″-1.5%
255/40R2028.03-0.31″-1.1%
295/35R2028.13-0.22″-0.8%
345/30R2028.15-0.20″-0.7%
235/45R2028.33-0.02″-0.1%
305/35R2028.41+0.06″+0.2%
275/40R2028.66+0.31″+1.1%
245/45R2028.68+0.33″+1.2%
315/35R2028.68+0.33″+1.2%

How to read 265/40R20

How to read any tire size

265/40R20 104Y as printed on the tire sidewall, with each part numbered265/40R20 104Y123456
How 265/40R20 104Y is printed on the sidewall. It's the most common code among the 14 tires here (4 of them); tires in this size come in other load and speed ratings too.
1265Section width

265 mm across the widest point, or 10.43 inches. Every 265 size

240Aspect ratio

A percentage, not a measurement: the sidewall is 40% as tall as the tire is wide, which is 106.0 mm or 4.17 inches.

3RConstruction

Radial construction.

420Wheel diameter

Mounts on a 20-inch wheel. Approved wheel widths run 9.0″ to 10.9″.

5104Load index

Each tire carries up to 1,984 lb (900 kg) at its maximum pressure.

6YSpeed rating

Rated for up to 186 mph sustained.

XLExtra load

Printed after the size.

SpecificationInchesMetric
Overall diameter28.35720 mm
Section width10.43265 mm
Sidewall height4.17106.0 mm
Circumference89.12,262 mm
Revolutions per mile (calculated, unloaded)711.5442 per km
Revolutions per mile (published by manufacturers)730–734454–456 per km
Approved wheel width9.0–10.9229–277 mm

Speedometer error after switching to 265/40R20

Your actual speed– mph

Questions about 265/40R20

What is 265/40R20 in inches?

28.35 inches tall, 10.43 inches wide, on a 20-inch wheel. Written in inches, that is roughly 28.3×10.4R20.

How much does a 265/40R20 tire weigh?

Between 28.3 lb and 33.3 lb for the 14 tires listed here. The lightest is the Michelin Pilot Sport 4 S (XL); the heaviest is the Michelin X-Ice Snow (XL).

What wheel width do I need for 265/40R20?

Manufacturers approve 9.0–10.9″ wide wheels for this size.

How many revolutions per mile does a 265/40R20 make?

Published figures run 730–734 revolutions per mile. The calculated figure is 711.5, but manufacturers measure the tire under load, where it rolls on a smaller radius.

How much taller is 265/40R20 than 235/45R20?

0.02 inches taller on paper (28.35″ vs 28.33″), which raises the axle about 0.01″. Your speedometer will read about 0.1% slow.