Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

3 gear single gear???

Old 03-30-06, 11:22 PM
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BoBo
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3 gear single gear???

could you ride SS in the back and have a triple crankset in front? giving you 3 gears?
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Old 03-30-06, 11:25 PM
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if you're going to have a rear der. to take up chain slack, and a front der. to shift, why not throw a cassette on there and actually have a useful gear range?
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Old 03-30-06, 11:36 PM
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Your chainline would be a train wreck too. I would have 3 on the back before I would have 3 on the front. Why not build a wheel out of a 3 speed hub?
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Old 03-30-06, 11:37 PM
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dayyyyyyyum, don't fuc with the jesus
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Old 03-31-06, 06:57 AM
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Better convert a sturmy archer 3 speed to 2 fixed speeds
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Old 03-31-06, 07:00 AM
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or just ride a sa 3 speed......

still wouldn't be a single speed though
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Old 03-31-06, 07:18 AM
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Originally Posted by Cynikal
Your chainline would be a train wreck too. I would have 3 on the back before I would have 3 on the front. Why not build a wheel out of a 3 speed hub?
... alternatively, you could just build a 3 speed cassette with a normal freehub, some spacers, and some Surly cogs.
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Old 03-31-06, 07:52 AM
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Or why not do 2 in front and 2 in back if ya just want to be different.

Yeah for a 3 speed, a Sturmey Archer hub is perfect. Why reinvent the wheel?
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Old 03-31-06, 07:53 AM
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Sheldon Brown does something like this on one of his bikes; he's got a double crankset and a flip-flop hub for a total of four gear options. Rivendell's Quickbeam does the same thing. Having a triple up front would require way too much chain for your dropout to handle unless you've got somebody to make you six inch long dropouts. To change the front rings, you have to manually move the chain and adjust the rear wheel.



Front chainrings on the Quickbeam are 40t and 32t. Any reason they couldn't be 44t and 36t or 48/40?
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Old 03-31-06, 08:16 AM
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Originally Posted by bbattle
Sheldon Brown does something like this on one of his bikes; he's got a double crankset and a flip-flop hub for a total of four gear options. Rivendell's Quickbeam does the same thing. Having a triple up front would require way too much chain for your dropout to handle unless you've got somebody to make you six inch long dropouts. To change the front rings, you have to manually move the chain and adjust the rear wheel.

Front chainrings on the Quickbeam are 40t and 32t. Any reason they couldn't be 44t and 36t or 48/40?
Maybe I'm wrong, but I think the OP was talking about having a front derailure so the bike could be shifted while riding. This would of course require a rear derailure, or a chain tensioner that looks an awful lot like a rear derailure to take up the chain slack when shifting from the big ring to the little one. In other words it would look just like a regular multispeed bike, would weigh about the same, would have the same chainline issues, just not as many gears.

Which begs the obvious question: why bother? Why not lose the front derailure instead, and go with an 8 speed cassette in back, or perhaps better yet an internal geared hub which could also give you near-perfect chainline, and the ability to shift standing still as well as while coasting or pedaling.
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Old 03-31-06, 09:05 AM
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You can, and I've seen a couple of 'cross bikes built that way. But it is not in any way a single speed.

The idea does make a little sense to me, since on my geared bike I shift in the front more than in the back.
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Old 03-31-06, 09:40 AM
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a friend wants me to build him a bike using an internal geared hub but I have never messed with one before. maybe someone can answer this about the sturmey-archer AW3 hub:
http://www.sturmey-archer.com/tech_3spd_AW3.php

it says the OLD is 126.8mm or 118.8. What rear spacing should the frame have to accomodate those sizes? anyone have cheap 29er/cx frame suggestions for their usage? i was thinking a surly karate monkey with one of the sram S7 setups just because the spacing fit, but something cheaper and simpler would be better.
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