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. These sizes can be thought of as a sort of shorthand for decimal siz… See more

In case the graphic above hasn’t done enough to quench your thirst for understanding, lets quickly touch on each wheel size and explain why and where they’re used. 1. 26″ mountain bike wheelswer… See more

As the saying goes, the great thing about standards is that there are so many to choose from. So far, we’ve talked about standard size labels (26″), which are shorthand for the decimal sizes, and touched o… See more

Some key takeaways from this article: 1. Count your blessings before bed every night that you live in a time where the ISO sizing system exists, and stick with it whenever you can. 2. For ISO sizes (30-584), both … See more