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Wheels with Asanti 28 in (710 mm) rims on a police Hummer H2 car. The wheel size is the size designation of a wheel given by its diameter, width, and offset. The diameter of the wheel is the diameter of the cylindrical surface on which the tire bead rides. The width is the inside distance between the bead seat faces.
The inner width of the rim on which the tire is mounted should be about 65% of the tire's nominal section width for tires smaller than 30 mm and 55% for those larger. The section height of a tire is usually identical to its section width (for tires less than 28 mm, 2.5 mm have to be added to the width to get the height).
Around 1999, a normal wheel size for recreational skates was 70-72mm, and large wheels for speed skates meant 78-82mm. [ 77 ] : 22–24 [ 111 ] : 315–316 By 2024, the standard wheel size for recreational skates became 80-84mm, and large wheels for speed skates meant 90-125mm.
ETRTO sizes apply to rims and tyres for vehicles of all types, including bicycles. The great advantage of ETRTO sizing is that it is unambiguous; previously, nominal dimensions were used which were interpreted in different ways by different countries and manufacturers - a problem for the end user.
As an example, if a tire size has two sets of numbers (6-12, 5.00-15, 11.2-24), then the first number (5.00-15) is the approximate width in inches, and the second number (5.00-15) is the rim diameter in inches. If a tire size has three sets of numbers (15x6.00-6, 26x12.00-12, 31x15.50-15), then the first number (26x12.00-12) is the approximate ...
Others resemble freeline skates in that they have a small squarish platform, but with 2 medium-sized wheels on either side, somewhat between a freeline skate and roller skates (but with inline-skate-styled wheels). Orbit wheel skates, another spiritual relative of the freeline skate whereby the skate stands on a grip-tape-surfaced platform ...