Hub

The hub is the beating heart of your bicycle's wheels. Located in the center of the wheel, it is the part around which the rim rotates. Hubs play a crucial role in overall bike performance, influencing the smoothness of the ride, the durability of the wheel, and even its aerodynamics.

A hub consists of several key parts: the axle, which fits into the bicycle fork or frame; the bearings, which allow the wheel to rotate freely around the axle; and the hub body, which connects the bearings to the rim via the spokes. The quality of the bearings and the precision of their fit are essential to ensure smooth, resistance-free rotation.

There are two main types of hub: ball-bearing and cartridge-bearing. Ball-bearing hubs are traditional and can be adjusted and maintained, while cartridge-bearing hubs are sealed and require little maintenance, but must be replaced when they wear out.

Rear hubs are particularly complex, as they incorporate the cassette (or freewheel) mechanism that allows the bike to move forward when you pedal, and to roll freely when you don't. Some top-of-the-range rear hubs also feature a quick-release system, improving the bike's responsiveness.

In mountain biking, hubs can be fitted with suspension systems to absorb shocks and offer better traction on uneven terrain. In road cycling, hubs are often designed to be as light and aerodynamic as possible.

Hub maintenance is crucial to the longevity and performance of your bike. This includes regular cleaning, checking bearings for wear or play, and periodic lubrication to maintain smooth rotation. Although some cyclists perform this maintenance themselves, it may be wise to call in a professional, especially for hubs with cartridge bearings.