
Custom Wheelsets let you make the decision on how your wheelset looks. Most mountain bikes use 26-inch (559 mm) bicycle wheels, though some models offer 24 or 29 in (520 or 622 mm) wheels. Bicycle wheel sizes are not precise measurements; a 29 inch mountain bike wheel actually has a 622 mm bead seat diameter.
622 mm wheels are standard on road bikes and are commonly known as 700c. 24 inch wheels are used for dirt jumping bikes and sometimes on freeride bikes, rear wheel only, as this makes the bike more maneuverable.
29 inch wheels were once used for only Cross Country purposes, but are now becoming more commonplace in other disciplines of mountain biking. A mountain bike with 29" wheels is often referred to as a 29er. Wheels come in a variety of widths, ranging from standard rims suitable for use with tires in the 26 in x 1.90 in to 2.10 in. widths popular with freeride and downhill bicycles.