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The three-speed bicycle is a bicycle that uses internal hub gears at the rear wheel hub to provide three gear ratios. Three-speed hubs have been in use since the early 1900s. Though they are heavier than comparable derailleur systems, internal-gear hub systems generally last longer and require less maintenance.
The 14-speed Rohloff Speedhub hub gear, introduced in 1998, has a range exceeding 5 to 1, and is thus comparable in range to 24, 27 and 30-speed derailleur systems (with 3×8, 3×9 and 3×10 cogs front and rear), since the latter have three overlapping ranges often with only about 14 distinct gears. As there is no overlap with the Speedhub, the ...
Sturmey-Archer Gears Ltd. designed the type SW Mk. 1 medium-flange wide-ratio three-speed hub in 1954 and began production by 1955, intending it to replace the AW series of large-flange hubs which were intended for discontinuation upon the SW's introduction (AW hubs were still being produced in 1956, and may have continued throughout the SW's ...
The Rohloff Speedhub is an epicyclic internal hub gear for bicycles, developed and patented by Rohloff AG. It has been manufactured and marketed by that company since 1998. [1] The Speedhub 500/14 has 14 equally spaced, sequential, non-overlapping gear ratios operated by a single twistgrip. The overall gear range is 526%, meaning the highest ...
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Single-speed mountain bike. A single-speed bicycle is a type of bicycle with a single gear ratio. 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 ...
Shimano Nexus gear shift lever. Shimano Nexus is a brand of bicycle components which includes products such as epicyclical gear hubs, cranksets, shifters, brake levers, hub brakes, hub dynamos, and a CPU for automatically changing gears. The series is primarily aimed at the "comfort" market such as urban commuters and tourers, and as such is ...
A fixed-gear bicycle. An 18-tooth sprocket that attaches to the rear hub of fixed-gear bike. Track sprockets are typically attached and removed from the hub by screwing them with a chain whip. This tool incorporates a lockring spanner for securing a reverse threaded lockring against the sprocket. A fixed-gear bicycle (or fixed-wheel bicycle in ...