Talk:Hub gear
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Not having understood too much about hub/epicyclic gears until today, I'd appreciate some feedback on the diagram I've added. As I understand it, there are several different ways of driving the gearing system, involving various configurations of fixed parts and movable parts. Some that I looked at had a fixed sun gear, and movable planetary gear holder that provided the input rotation; I don't know which is more common.
A good explanation of how gearing ratios are determined in this sytem would be nice to have! Also, if anyone can point me to some good diagrams of how an epicyclic gearbox or transmission (with multiple ratios) works, I can think about making a diagram of that too. -- Wapcaplet 03:25, 14 Nov 2003 (UTC)
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[edit] hub gear?
Should this article be hub gear? Kingturtle 05:05, 15 Nov 2003 (UTC)
- Possibly, though maybe a better name would be epicyclic gear or epicyclic gearing. Feel free to move it :-) -- Wapcaplet 06:25, 15 Nov 2003 (UTC)
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- The article is about cycling hubs in particular, so I wouldn't call it "epicyclic" because few cyclists refer to it that way. geared hub or internally geared hub would make more sense to me. At some point it may make sense to put the technical details under one of the epicyclic suggestions and reference it from the hub article which might contain more cycling-specific and historic info AHands 12:39, 15 Nov 2003 (UTC)
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- Nice graphics by the way! What do you use for the 3d modeling?
- Thanks! A distinction between epicyclic gearing in general and cycling hubs in particular would be good to have. I'm tending more towards explaining epicyclic gearing in general, so maybe we need a new article. The models are made in Blender. I've made an animation for the latest one, but unfortunately there are some limitations at present on size and video format for Wikipedia, so those probably won't be useful any time soon.
- I'm working on finding some good explanations of how gear changes are effected in hub gears for bicycles. So far, I've found some very complex diagrams, which don't do much by way of explanation, some explanation without diagrams, and a few other grainy photos and generalized statements about how they work. I'm looking for something that would be relatively easy to illustrate, such as how a three-speed hub gear works. When I do figure it out, I'll make models and upload them! -- Wapcaplet 17:49, 15 Nov 2003 (UTC)
[edit] Heavier or lighter? More or less expensive?
Someone's confused the advantages/disadvantages section recently by replacing an item stating that hub gears are heavier with one stating that they are not, and that they cost around the same as derailleurs, but leaving it under Disadvantages. As it's currently worded, it's a neutral statement, and I don't know enough about gears to say whether it's right or wrong.
[edit] Usage in USA/UK - Continental Europe and the World
It seems rather strange to make such broad claims about the usage in different regions of the world. They should at least be substantiated by an independent source. Bfg 12:01, 5 July 2006 (UTC)
- Also, first it says derailleur gears are most common in the UK and US while hub gears are more common in continental Europe. But a bit further it says derailleur gears have since the 1950's become the most common type of gear system on bicycles. But I imagine that in other parts of the world they are very uncommon. Or is it that there, no gears are the most common thing? It seems too strong a statement, so I'll tone it down a bit. DirkvdM 07:25, 2 August 2006 (UTC)
[edit] Image/Illustration
I know the cutaway image of the 14-speed hub is fantastically fascinating and beautful, but such intricate and recently developed mechanisms are almost unheard of in practice. Might it be better to find a similar image of something more illustrative of hub gears commonly used by cyclists (3-speed, probably), rather than a rather baffling mechanical curiosity? Ninly 17:31, 11 August 2006 (UTC)
[edit] Maximum Number of Speeds
The paragraph used to read that they are made with up so 38 speeds. I searched Google for "thirty-eight speed hub" and nothing showed up. If someone can find a citation, put it back in. But I changed it to 14, to reflect Rohloff's highest number.
