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Conversions

 

Checkout Dimensional Conversions tables

SIZES ARE EXPRESSED DIFFERENTLY ACCORDING TO THE VARIOUS STANDARDS OR USES.

MTB AND CITY TIRE SIZES ARE GIVEN IN INCHES. In this example: 26 x 1 1/8 x 1 1/2, the first number (26) is the overall tire diameter. The second number (1 1/8) is the height of the tire in inches and fractions of an inch. The third number (1 1/2) is the tire width in inches and fractions of an inch.

FRENCH SIZES are used for Road tires. In this example: 650 x 32A, the first number (650) is the overall diameter of the tire in millimeters. The second number (32) is the tire width in millimeters. The letter A indicates that the rim is 590 mm.

ETRTO (EUROPEAN TIRE AND RIM TECHNICAL ORGANIZATION) SIZES are given for all tires. In this example: 32 x 590, the first number (32) is the tire width in millimeters. The second number (590) is the tire diameter in millimeters. This chart shows the conversions for all the sizes.

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