Category: The Hub ( TV channel )

* Hub gears

Hub gears have in the past also been used on motorcycles, although this is now rare.

* Hub gears are sealed within the hub, which protects them from water, grit, and impacts.

* Hub gears completely avoid the danger of collision with the spokes and wheel-collapse that derailleur systems can suffer.

* Hub gears can change gear ratios when the rear wheel is not rotating.

* Hub gears can be simpler to use for inexperienced riders, because there is generally only a single shifter to operate and there are no overlapping gear ratios.

* Hub gears provide a means for shifting gear ratios on drivetrains incompatible with external deraileurs such as belt drives and shaft drives.

* Hub gears are typically more expensive than derailleur systems.

* Hub gears tend to be heavier than derailleur systems with equivalent gearing characteristics, and the additional weight is concentrated at the back wheel.

* Hub gears are more complex and usually more difficult for the rider to repair, especially at the roadside.

* Hub gears are generally incompatible with quick release mechanisms / skewer axles.

Hub gears use epicyclic gearing and are enclosed within the axle of the rear wheel.

Hub gears by design are indexed, but for derailleur systems, indexing was an innovation.