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"The hub does not "hang" from the the top spokes."
I don't have either of the books cited, wish I did. Is this a direct quote or paraphrase? It would seem to me that if the tension if the spokes above the hub is higher than the tension in the spokes below the hub, then the hub does in fact "hang" from the upper spokes. It certainly does not "rest" on the lower spokes if they are under tension. -AndrewDressel15:36, 17 August 2006 (UTC)[reply]
No, it's not a direct quote. If you compared a wheel not under load and one under radial load, the only significant change of spoke tension is that the spokes directly under the hub becomes more slack. So in effect the hub does "rest" on the lower spokes, but because they are in tension, the load is taken by those spokes becoming looser. This can be demonstrated by plucking the spokes which will indicate any change in tension, as mentioned in "The Bicycle Wheel". LDHan17:47, 17 August 2006 (UTC)[reply]
So it is just semantics. I'd say that if the spokes below are under tension and not compression, then the hub is definitely not resting on them. If the spokes above are in sension, then the hub is definitely hanging from them. That's just my understanding of the terms "hang" and "rest". Anyway, as I've learned, wikipedia is not about "truth" but about "verifiability". I'd stick with a direct quotation in this case. -AndrewDressel02:23, 19 August 2006 (UTC)[reply]
If you use the phrase the bottom spokes increase in compression instead of bottom spokes decrease in tension (both are same), and that the top spokes do not change tension, then it might be more clear that the hub does not "hang" from the upper spokes. LDHan10:07, 19 August 2006 (UTC)[reply]
That's where we disagree. My understanding of the terms is that a member cannot be in compression until the tension become negative, and visa versa. Both are opposite and relative to the rest state. -AndrewDressel01:33, 20 August 2006 (UTC)[reply]
THE WHEEL STANDS ON ITS SPOKES ... the wheel is not supported by the bottom spokes only. Without the rest of the spokes, the bottom ones would have no tension. Standing, in this case, means that the spokes at the bottom are the ones that change stress; they are being shortened and respond structurally as rigid columns. Quote from The Bicycle Wheel, Jobst Brandt.
So it really does boil down to semantics. What is the definition of "compression", "tension", "stand", and "hang"? I suggest you use direct quotations heavily. -AndrewDressel01:33, 20 August 2006 (UTC)[reply]
Take out the bottom 8 spokes of a wheel and put your weight on it. The wheel will still support your weight. A wheel _does_ 'hang' from the top spokes. Ender828208:23, 23 April 2007 (UTC)[reply]
Wooden rims
Caption to Image:Bamboobike.jpg claims that the rims are wooden... I doubt this and there is no mention of it in the image summary. They look like rusted steel to me. Have messaged the image uploaded but consider this a request for any other input. bad·monkeytalk to the {:() :: 05:55, 3 April 2007 (UTC)[reply]
Yes, the wooden bit is actualy the tyre. If there were no metal rim as well, then how would the metal spokes be fixed to the rim securely enough perform well?Gregorydavid13:10, 3 April 2007 (UTC)[reply]
In fact it is highly likely that the rims are made from wood. Wood was the most popular material for rims around that time and metal rims only became popular (on safeties) with the rise of rim brakes (which this bicycle does not have). The tires are certainly not wood, they are pneumatic rubber types, the valves are visible coming out of the rims. Will.law17:13, 3 April 2007 (UTC)[reply]
The fact that wood has been used for rims is not in question; merely what this picture is of. If you look around where the rim meets the tyre (which is most certainly not wood!), you can see shine and reflections which give it the appearance of metal to me. bad·monkeytalk to the {:() :: 03:39, 4 April 2007 (UTC)[reply]
As the image uploader I cannot solve the problem definately because the pic was taken a few years ago, very far from where I live and with a poor camera resolution. The only thing I can tell is that if there had been sthg unusual about the wheels, i would probably have noticed that and included it in the image summary. So it seems the wheels were made as they mostly are today - steel and rubber. other clues are what seem to be reflections on the rims and possible technological problems with joining wood with obviously metal spokes. Personally, I would opt for removing the example from the article until some Wikipedian from Holešovice in Prague goes for a nice walk to the nearby Technological Museum and finds out the Truth ;-) Mohylek13:43, 5 April 2007 (UTC)[reply]
It does not look like a wooden rim so the caption is wrong.
There is nothing that allows the wheel to stand out from the rest of the bike. I don't see what purpose that picture serves.
I can supply a picture of JUST a bicycle wheel. I also have pictures of hubs. I am new to this and don't know how to post an image. Respond with a link or send me directions to ender8282@yahoo.com. Ender828208:29, 23 April 2007 (UTC)[reply]
Hub
I made a bunch of changes to the hub section. Any feedback/editing would be welcome.
If anyone would like to talk about coaster brake hubs and internally geared hubs I would love someone else describing them. Ender828208:34, 23 April 2007 (UTC)[reply]
Reaction to inertia
concerns about rotational inertia of bicycle wheels are vastly overstated--the inertia of all bicycle wheels is negligible compared to the mass of the rider.
Can you back this up with any data or references. Have you ridden wheels with low and high moments? There _is_ a noticeable difference when accelerating and climbing.
Ender828219:03, 23 April 2007 (UTC)[reply]
The number of spoke holes on the rim normally matches the number of spoke holes in the hub. Some unusual rim designs have no holes for spokes, for example Campagnolo road rims and the Velocity Zvino MTB rims.
Huh - Campagnolo rims (presumably, the rims used on Campy's own wheels) don't have spoke holes? Both my sets do! Which wheels don't use holes for spokes? If it is just a few designs, we should probably say "for example some Campagnolo road rims".
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