Shimano Alfine

The internal mechanical design of the gear hub was based on that of the Shimano Nexus Inter 8, with two stepped planetary series, 5th gear being 1:1 direct drive,[3] thus offering 8 speeds with percent intervals of 22,16,14,18,22,16,14, and an overall gear range of 307%, yet in a more attractive design than the Nexus, with better seals allowing slightly greater ruggedness, more attractive auxiliary components such as e.g. a ratcheting trigger shifter similar to the high-end Shimano derailleur shifters, and a hub shell with splines for mounting a disc brake rotor of the center lock standard.

[4] Alfine 700 is an internal epicyclic hub gear for bicycles, manufactured by Shimano since 2010.

[7] When introduced it had a claimed weight of approximately 1600g without auxiliary components (bolts, actuator, cog, wire, shifter).

[9] The internal mechanisms comprise three stepped planetary series in a sealed oil bath, for greater power transfer efficiency.

[10] This version differs slightly from the 700 model and requires a motor unit with a battery, and an electronic shifter.