This varies from 1 6 to 2 5 inches.
Mountain bike tire width sizes.
Trail and all mountain bikes will have tires in the 2 25 to 2 4 width range.
Once you ve identified your tire diameter 29 27 5 or 26 you ll want to dial in your width.
Mountain bike tire size and width.
A cross country bike will have tires in the 1 9 to 2 25 width range.
Tires come in three diameters.
Tires are also measured in width.
Check your tire s sidewall the numbers there indicate your tire size roughly its outer diameter and its width but not always in that order.
Typical mountain bike tire.
These sizes can be thought of as a sort of shorthand for decimal sizes each with a corresponding iso measurement.
Some special tires can even be wider up to 3 inches with some models.
The sizes you commonly see for mountain bike wheels like 26in 27 5in and 29in all refer to the outside diameter of the wheel with the tire fully inflated.