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Rohloff AG: Speedhub 500/14: 1998 14 526% 130 Nm 11th gear 1700-1825 g [8] ... Sturmey Archer A[BC/T3], AW[C], S[C3/SAB], [S/X/XL]-R[F/S/F]3, SEARS 503.21 [23] 1933 3
Before epicyclic gears were used in bicycle hubs, they were used on tricycles. Patents for epicyclic hubs date from the mid-1880s. [5] [6] The first patent for a compact epicyclic hub gear was granted in 1895 to the American machinist Seward Thomas Johnson of Noblesville, Indiana, U.S.A. [7] This was a 2-speed but was not commercially successful.
All Sturmey-Archer gear hubs use epicyclic (planetary) geartrains of varying complexity. The AW is the simplest, using one set of planetary gears with four planets. The AM uses three compound planets with differently sized cogs machined from a common shaft to engage the gear ring and sun gear separately, while the close-ratio three-speeds, and hubs with four or more speeds, use multiple ...
Hub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available ("Sturmey-Archer"), Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cables; Indicator: a turn signal; Inner tube: a bladder that contains air to inflate a tire. Has a Schrader, "Woods"/"Dunlop" or Presta valve for inflation and ...
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 .
Belt-driven bicycles and their repair or replacement parts are scarcer at shops than bicycles with conventional chain. Front and rear pulleys or sprockets must be well aligned to avoid excessive friction and wear. A chain is more flexible in this respect. [8] Compared to a chain, belts are typically run at a much higher tension.
Sturmey was a well known expert on bicycle gearing and his name was valuable to Bowden to give the new three-speed hub credibility. Bowden persuaded Sturmey to stay with the project and an elaborate story was concocted to give the impression of technical collaboration between Sturmey, Archer, Reilly, G.P. Mills (Raleigh's chief designer) and ...
The Rohloff Speedhub 500/14 is the only bicycle hub with 14 gears, which can replace a regular chain derailleur system regarding level of friction and range of transmission. Rohloff AG also used to make an automatic chain lubrication system called Lubmatic, and cycle tools such as a chain riveting tool and a chain measurement tool.