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Note that if a normal right-side-drive crankset is installed backwards to create a left-side-drive bicycle, the threaded pedal holes at the end of the crank arms would be reversed. In this configuration, precession may loosen the pedals over time, causing the pedals to become detached and/or damaging the pedal threading in the crank arms. A ...
According to F. Lisheng and T. Qingjun, the hand-crank of the rotary quern was different from a crank, which was the combination of a hand-crank and a push-and-pull connecting rod by a hinge. [ 7 ] The Antikythera mechanism, dated to around 200 BC, [ 25 ] [ 26 ] used a crank as a part of its mechanism. [ 27 ]
Bicycle pedal, quill road type, with toe clip and toe strap (1970s) The quill pedal is a common pedal system on bicycles. It consists of a main axle section that is attached to the bicycle crank arm and contains extensions from the axle to which parallel cage plates are attached at the front and rear of the pedal.
The Q factor is an important factor affecting how close the pedals are laterally, and therefore the affects the spread of the riders legs. The Q factor or quack factor [1] [2] of a bicycle is the distance between the pedal attachment points on the crank arms, when measured parallel to the bottom bracket axle. [3]
Side view mirror: aids in looking at the sides prior to moving slowly or turning to the left or to the right Skirt guard or coatguard : a device fitted over the rear wheel of a bicycle to prevent a long skirt, coat or other trailing clothes or luggage from catching in the wheel, or in the gap between the rim and the brakes
Swingbike, a fun-bike where both the front and rear fork can swing, so that the rider can turn both with their hips and with the handlebars, and thereby partially create propulsion with their hips [7] Risigo, a fun-bike where the seat moves up and down in coordination with the crank, so that the hip prevents (or contributes to) propulsion [7]
Cadence can be measured via various types of sensors, for example a simple reed switch and a magnet which detects one revolution each time the crank arm passes a point on the frame, or more advanced sensors based on a force sensor (e.g. pedals), torque sensor (e.g. crank arms) or other types of cycling power sensors.
The Shimano Front Freewheel (FFS) was a proprietary bicycle drivetrain design of the 1970s that placed a freewheel between the pedal cranks and the front chainrings – enabling the rider to shift gears while coasting. [2] FFS rear freewheel is different than a standard freewheel because it's "stiff" with more friction than a normal rear freewheel.