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An internally-geared hub is a gearing system contained within the rear-wheel hub of a bicycle. All the components are contained within the sealed hub, making them less susceptible to the elements when riding. They are generally regarded as lower maintenance than dérailleur gears. Usually they will have a somewhat narrower range of gears, and larger steps between the gear ratios.

15 votes
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How many miles and/or commuting seasons will a modern internal geared hub last?

I bought a 700c Jericho hardtail in 1997, which came with a Rohloff 14 speed internally geared hub. I used it as a commuter for five years, at least 150 miles per week, 50 weeks of the year. That's 37 …
zenbike's user avatar
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8 votes
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Can a Shimano Alfine 8 speed be reduced to 120mm hub spacing?

No, with either the 8 or 11 speed Alfine hub, there is no possibility of using it on a 120mm frame. The hub shell itself is about 120mm wide, without the cable carriers for shifting, or any spacers at …
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6 votes

Nexus hub keeps getting misaligned

It sounds as if you adjusted the barrel adjuster out too far, the last time you adjusted it, and damaged the threads on the adjuster. When the shop cleans and lubes it, it is fine for a few days, and …
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5 votes
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Bottom bracket with built-in internal hub - does this exist?

Technically, no, there is no current commercially available gearbox bottom bracket. Most likely, the Truvativ Hammerschmidt is the crankset you are thinking of. There were also gearboxes designed by H …
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5 votes

Why not have the gears inside the bottom bracket?

There are a couple of crank designs that use this principle. Off hand, the HammerSchmidt crank from SRAM is the most practical current application of it because it doesn't require deviation from the c …
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1 vote
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Clicking gears on new Electra Townie 8i

It can be many issues, but a click in the hub which is a rotary noise, is usually the Chain guard or the dust cap on the hub behind the cog which has popped out of place, or possibly cracked. The no …
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1 vote
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Alfine 11-speed - what is needed to install it? What are common problems when installing?

With the bike linked, I don't think this hub can be fitted properly. It requires a method to adjust the chain tension, and this frame has neither the eccentric bottom bracket recommended, nor a hori …
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