What do the numbers mean on a bicycle tire?

The first number is the diameter of your wheel. Sizes such as 26, 24, 20, 27.5, 29 and 700c are common tire diameters. The second number (after the X) is the width of your tire. For example, a 26 x 1.75 size means the tire diameter is 26 inches and the tire width is 1.75 inches.

What does C mean in bike tire size?

The letter “C” in a tire’s parameters refers to an archaic French standard for bike tire sizing which relied on letters ranging from “A” to “D” to indicate a tire’s width and subsequently the circumference of the corresponding rim.

What does 275 mean on a tire?

“275/35R19″ means the tire is 275 mm wide, has an aspect ratio (that is, the width divided by the height) of 35%, and fits on a 19” wheel. You can figure out the height of the sidewall by multiplying the section width (275) times the aspect ratio (35%). The sidewall height of our example tire would be 275 *.

What is a 28C bike tire?

You’ll find the tire size of your bike by looking on the sidewall of the bike’s tires (have a close look just above the metal wheel rim surface where the brake pads touch). The “700” is the tire diameter and the “28c” is the tire width.

What pressure should my bike tires be at?

Pump it up. Proper tire pressure lets your bike roll quickly, ride smoothly, and avoid flats. Narrow tires need more air pressure than wide ones: Road tires typically require 80 to 130 psi (pounds per square inch); mountain tires, 25 to 35 psi; and hybrid tires, 40 to 70 psi.

Is 26 inch the same as 700C?

A 26 inch, or a 650c wheel is about 1 inch smaller (about 2 inches smaller with road slicks) in diameter than a 700c. Some people think that because 700c wheels are the ‘standard’ for road bikes, they must be better.

Is 29 and 700C the same?

29″ (ISO size 622) is actually the same rim diameter as 700C, although most 29″ tires will not fit 700C road rims because they’re too wide. 29″ tires are popular with mountain bikers; search for 29″ MTB. 700C (ISO size 622) is the most commonly used size for modern road bikes.

What’s the difference between 700×23 and 700×25?

The 23s are thinner, lighter (because they are thinner), and a little faster. 25s are 2mm greater in diameter, so they are a little heavier and better on rough roads.

What are bike tire sizes?

Generally speaking,Bicycle tire measurements have two components. The larger number is the tire diameter in inches, and the smaller number is the tire width in inches. Tire diameter usually ranges from 12 to 26 inches, and tire width normally ranges from 1.75 to 2.215 inches.

How much taller is a 305 tire than a 275?

The 305 is 10.9% wider than the 275 (in general terms — there is variation by brand).

What is the difference between 275 and 265 tires?

In every category that was used to compare size, the 275 is slightly larger than the 265. For section width, the 265 came in at 10.43 inches while the 275 measured 10.83 inches. You can change rim sizes to an 18 from a 17 inch or a 16-inch rim and the 275 will still be the larger tire.

What does 275 55R20 mean on a tire?

On this page you’ll find a color-coded explanation of the 275-55R20 tire code. This number means that your tire has an aspect ratio of 55%. In other words, your tire’s sidewall height (from the edge of the rim to the tire’s tread) is 55% of the width. In this case, the sidewall height works out to be 151 millimeters.

Is a 28 inch tire the same as 700C?

28”/700C/29er The wheel sizes 28”, 700C and 29er or 29” all refer to the same rim size: ETRTO 622. The tyres can differ, but the 28”, 700C and 29er are all the exact same rim diameter. The 700 markings will be followed by the width in mm, and the 28 or 29 markings will be followed by the width in inches.

Is 27.5 the same as 700C?

Just as a 700C wheel is the same diameter as a 29” (29er) wheel, 650B shares the exact same rim diameter as 27.5”. 27.5”/650B rims have a bead seat diameter of 584mm, and 29”/700C rims have a bead seat diameter of 622mm.

What does 700x38c mean on a bike tire?

700x38c is the size of your bicycle tire. 700 is the nominal diameter of the tire in millimeters. 38 is the width of the tire (as seen if you were looking at your bike from the front/back). C refers to the old French system of classifying wheels according to their Bead Seat Diameter.