Rear hubs

The central part of the wheel around which the rotation occurs is called the hub. This important structural element consists of several parts. The hub design for BMX bikes:

• flanges (protruding parts with holes in which the spokes are fixed);
• hub shell (holds together all parts of the hub), its main feature is rigidity;
• axle (the wheel turns around it), there are one-piece ones that are attached using a nut and hollow ones using a bolt;
• bearings (an important part, thanks to which the wheels rotate), the front hub is equipped with two bearings, while the rear hub with four or more.

BMX hub bearings are also different. There are industrial, bulk and polymer plain bearings. It is up to the rider to choose which of them is better. Each has its own disadvantages and advantages; it all depends on the riding style.