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Wheels equipped with quick release mechanisms can be removed from the bicycle frame and replaced without using tools by opening and closing the cam lever, thus more quickly than wheels with solid axles and nuts. On the negative side, a quick-release hub renders a wheel more vulnerable to theft and care must be taken to ensure that the mechanism ...
Quick release hubs for disc brakes and rim brakes. Also a 15mm thru-axle for mountain bikes with disc brakes. They claim a very high efficiency and light weight compared to other hub dynamos currently on the market. [7] [8] Kasai makes a series of Dynacoil hub dynamos for rim and disc brakes with both quick-release and through-axle models.
Usually, either the axle is bolted to the fork, or a quick release skewer passes through a hollow axle, clamping the axle to the fork. A bicycle dropout (drop out, frame end, or fork end), is a slot in a frame or fork where the axle of the wheel is attached.
These may be integral to the fork end or separate items. They work by holding the rear axle in an eye at the end of a threaded bolt. The bolt passes through a cap which fits over the open fork end. Tightening the bolts on each side causes the axle to be pulled backwards towards the open fork end, tensing the chain.
The hub axle of a hub gear (unlike that of a derailleur system) will carry torque in all gears except direct drive, and so must be securely braced against rotation. While anti-rotation washers between the dropout and axle nut have often proved adequate, wider-ranging modern systems use a reaction arm affixed to the chain stay.
Drum brakes do not adapt well to quick release axle fastening, and removing a drum brake wheel requires the operator to disconnect the brake cable as well as the axle. They also require a torque arm which must be anchored to the frame or fork of the bicycle, and not all bicycles are constructed to accommodate such fastenings or tolerate their ...
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The axle is attached to dropouts on the fork or the frame. The axle can attach using a: Quick release - a lever and skewer that pass through a hollow axle designed to allow for installation and removal of the wheel without any tools (found on most modern road bikes and some mountain bikes).