Downhill bikes which are meant to withstand the abuse of drops and rock gardens are typically equipped with tires up to 2 5 wide.
Mountain bike tire width sizes.
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.
Tires come in three diameters.
Trail and all mountain bikes will have tires in the 2 25 to 2 4 width range.
Mountain bike tire size and width.
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.
This varies from 1 6 to 2 5 inches.
Typical mountain bike tire.
Once you ve identified your tire diameter 29 27 5 or 26 you ll want to dial in your width.
2 2 and 27 5 indicate a tire that has a width of 2 2 and an outer diameter of 27 5.
26 inches 27 5 inches and 29 inches.
Tires are also measured in width.