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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.
Double-ended cone wrenches, 13–16mm. A cone wrench or cone spanner is a tool used in bicycle assembly and maintenance to adjust the cones of cup and cone bearings.Cone wrenches are thinner and lighter than most other open ended wrenches that are used to work on bicycles.
Tire levers are used for removing the tires from the rim, often for changing the inner tube. Plastic levers are more prone to breakage; metal ones damage tubes, tires, or rims more easily. Cone wrenches (spanners) are needed to dismantle and adjust the hub bearings. Spoke wrenches are used for tensioning the spokes of a wheel.
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
Shimano STI Dual Control shifter and brake lever: 1. Main lever 2. Release lever A. Pulling the main lever towards the rider applies the brake B. Pushing the main lever towards the center of the bike downshifts one, two or three gears depending on how far the lever is pushed (right hand shifter) or changes from a small chainring to a larger chainring (left hand shifter)
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]
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 ...
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 ...
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