Road Bike Tire Sizes Chart

It s a holdover from an old french system that designated tire sizes using the letters a b and c.

Road bike tire sizes chart. Mountain bike sizing can be affected by suspension and your tire choices. Mountain bike size chart. These would usually be measured in inches 26 27 etc or millimeters 650 700 etc. Bicycle tires come in a variety of sizes and with time the international organization for standardization iso has developed a universal system to better understand and regulate tire and rim sizing.

So make sure you look at a tire size chart and try a full suspension mountain bike for size before buying. The tire size chart below includes bicycle tire sizes and how they are commonly written. The table below lists all the wheel sizes in bikecalc. The second smaller number is the tire s width.

Generally bike tire sizes are indicated with two numbers that correspond roughly to the outside diameter of the tire and the width of the tire. If your rim tire combination isn t listed measure your wheel and use the bikecalc rim tire combination that will result in the nearest circumference or email me your rim tire sizes and i ll add them to bikecalc. Some older road bikes still have the 27 inch size. Note that the c does not stand for centimeters.

23c 25c and 28c their width in mm. Common road bike widths in millimeters come in sizes ranging from 18 to 23 with a typical road bike tire at 700 x 23. Road bike tires generally come in three widths. As the width increases the tire will have more contact surface with the road making it more stable and comfortable.

700 x 32c indicates a tire that has an outer diameter of 700mm and a width of 32mm. As the width decreases there is less rolling resistance or friction and therefore is faster. Consider the bike type. Because of the high pressure and desired low rolling resistance road tires come in narrow widths.