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A bicycle shifter or gear control or gear levers is a component used to control the gearing mechanisms and select the desired gear ratio. Typically, they operate either a derailleur mechanism or an internal hub gear mechanism. In either case, the control is operated by moving a cable that connects the shifter to the gear mechanism.
Squeezing the brake lever tightens the cable against the channel to produce braking friction. [49] A return spring slackens the cable when the brake lever is released, no adjustment is required, and the brake becomes more forceful when wet. Husted said his inspiration was the band brake used on industrial machinery. [50]
Head tube: the tube of a bicycle frame that contains the headset; Headset: the bearings that form the interface between the frame and fork steerer tube; Hood: the rubber brake lever covering on bikes with drop style handle bars; Hub: the core of a wheel; contains bearings and, in a traditional wheel, has drilled flanges for attachment of spokes
The single cable from the handlebar's rear brake lever divides into two cables which are routed to opposite sides of the stem or fork steer tube and into cable stops. The inner cables connect to metal tabs on a disc attached to the upper side of a thrust bearing placed around the stem or steer tube. Squeezing the brake lever pulls the inner ...
For this reason, certain handlebars are now available in multiple sizes related to the shifter or brake lever clamp diameter. Standard road drop handlebars (including track, cyclocross and touring bars) use a 23.8 mm (15 ⁄ 16 in) grip/lever diameter, which is matched only to road bike type shifters or brake levers. This diameter is usually ...
Bicycle racks are one of the most commonly used bicycle storage devices. They are usually made of metal or plastic and can support the weight of the bicycle while lifting it up to save space. Bicycle racks can be placed on the ground or on the wall, allowing the bicycle to be hung up and not take up floor space.
Both included the built-in adjusters that allowed riders to adjust brake clearance while riding. MAFAC also supplied rubber lever arm covers as an option. City bike levers were supplied with plastic lever arms. MAFAC produced side-pull brakes in the late 1970s and early 1980s, concurrently with their cantilever and center-pull offerings.
Bicycle and motorcycle dynamics is the science of the motion of bicycles and motorcycles and their components, due to the forces acting on them. Dynamics falls under a branch of physics known as classical mechanics. Bike motions of interest include balancing, steering, braking, accelerating, suspension activation, and vibration. The study of ...