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A single-speed bicycle is a type of bicycle with a single gear ratio and a freewheel mechanism. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle. Adult single-speed bicycles typically have a gear ratio of between 55 and 75 gear inches, depending on the rider and the anticipated ...
A chain drive and rear derailleur gear change, the most popular system in use today A shaft-drive with crankset and rear gear hub. Bicycle drivetrain systems are used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels.
~5th gear (0.995 ratio) 1665 g [10] City, Sport, Touring ... 1st gear 1650 g e-bike Shimano Nexus 4 Speed 4 ... 1st Gear 1160-1630 g City/Folding
Gain Ratios—A New Way to Designate Bicycle Gears; Gain and Watts Calculator; Mike Sherman's gear calculator Archived 2011-03-10 at the Wayback Machine Online calculator for derailleur gears, with useful graphic displays; HPV Drivetrain Analyzer A drivetrain analyzer and gear calculator for HPV's (Human Powered Vehicles) that will handle ...
Usually the second sprocket is larger, which provides the cyclist a lower gear for climbing steep inclines simply by pedaling backwards. While most historical examples of retro-direct bicycles used the reverse gear for climbing, several modern retro-direct riders prefer pedalling forward when standing to accelerate from rest and climb, and ...
They are durable and comfortable, capable of transporting baggage, and have a wide gear range. The BXR bike (a.k.a. Bicycle Crossroadster) or Sport Touring BMX. features an lightweight BMX bike-sized (20-inch/406 mm rims) wheels or (22-inch/451 mm rims) wheels; Built-in frames, usually from the BMX racing, minivelos or foldable city/touring bikes.
A great "on road" gear ratio, for the 26″ wheel, is 42:17, approximately a 2.5:1 ratio and 64.2 gear inches for versatile tour riding. Many British enthusiasts used to tour on 27–inch–wheeled lightweights on a single fixed–gear of 69 inches before multi–speed gearing became universally popular, though this certainly made for tough work.
A hub gear, [1] internal-gear hub, [2] internally geared hub [3] or just gear hub [4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the gears and mechanism are exposed ...