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Tire sizes

265/60R20 — the Tundra's 20-inch tire, half an inch under 33

Close enough to a 33 that the speedometer cannot tell, and two inches away from looking like one.

Metric notation · Light truck (LT-metric)

Overall diameter
32.52 in
826 mm
Section width
10.43 in
265 mm
Sidewall height
6.26 in
159 mm
Aspect ratio
60%
sidewall as a share of width
Wheel diameter
20 in
the hole in the middle
Circumference
102.2 in
2595 mm
Revolutions per mile
620.2
geometric, not measured
Revolutions per km
385.4
geometric, not measured
Typical load index
108–129
2205–4079 lb per tire

LT-metric tires use a stiffer casing at a much higher reference inflation — Load Range C, D or E, meaning 50, 65 or 80 psi. The index band reflects the pressure the casing is rated to hold, not a larger tire.

The load-index range shown is the band this CLASS of size is typically produced in — not a list of what is in stock for this exact size today. Load index and speed symbol are printed on the sidewall of the specific tire you are holding, and the required minimum is on the placard of the specific vehicle you are fitting. Read both.

Nearest real sizes in imperial notation, same wheel

  • 33x12.50R2033.00 in tall+0.48 in
  • 35x12.50R2035.00 in tall+2.48 in
  • 37x12.50R2037.00 in tall+4.48 in

Compare any two sizes, including ones this site has no page for, in the comparison tool.

Platforms recorded with this size

The third-generation Toyota Tundra is the only vehicle here recorded with 265/60R20 from the factory.

Against the flotation 33 on the same wheel

33x12.50R20 is 0.48 in taller, or 1.48%. A dial showing 70 mph would then correspond to 71.0 mph, and a hundred recorded miles to 101.5. In section width the two are 2.07 in apart.

That pairing is worth holding onto, because it is the shape of almost every metric-to-flotation comparison on a 20-inch wheel: a small difference in the number that drives the arithmetic and a large one in the number that drives the appearance.

Where it sits on a 20-inch wheel

Size Diameter Difference Section width
265/50R20 30.43 in −2.09 in 10.43 in
245/60R20 31.57 in −0.94 in 9.65 in
275/55R20 31.91 in −0.61 in 10.83 in
265/60R20 32.52 in — 10.43 in
275/60R20 32.99 in +0.47 in 10.83 in
33x12.50R20 33.00 in +0.48 in 12.50 in
305/55R20 33.21 in +0.69 in 12.01 in

Three sizes sit inside three quarters of an inch above it, and their section widths run from 10.83 in to 12.50 in. Height is barely the variable at all in that part of the ladder.

On the Tundra's own list

The Tundra's other factory sizes are 245/75R18 at 32.47 in, 265/70R18 at 32.61 in and 285/45R22 at 32.10 in. This one falls in the middle of that group, 0.09 in below the 18-inch 265 and 0.42 in above the 22-inch 285.

Its listed upgrades go considerably further: 35x12.50R20 at +2.48 in and LT295/65R20 at 35.10 in. Both are more than two inches of extra diameter, which is a different order of change from anything on the factory list.

The plus sizing reference covers what changes and what does not when the wheel diameter moves under a fixed rolling height. Load index and speed symbol are properties of the individual tire rather than of the size code, and the figure a vehicle needs is printed on its own tire and loading placard.

Related

Class: Light truck (LT-metric). Every figure above is computed from the size code, not stored — see how these numbers are calculated.