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has anyone ever tried this?

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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)

has anyone ever tried this?

Old 01-02-07, 10:24 PM
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scotthorrigan
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has anyone ever tried this?

taken two same length crank arms with same size chain rings put one on each side of your BB. added a double fixed hub with two same size cogs on each side and tossed two chains on it?


logically a dumb idea, but would there be any advantages?
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Old 01-02-07, 10:29 PM
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it would only be cool if they were kangaroo cranks, it would be more expensive, heavier and not any more efficient, but damn would it look cool
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Old 01-02-07, 10:31 PM
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i've seen it done.
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Old 01-02-07, 10:42 PM
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I wanna do it. Time to find some spare parts.
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Old 01-02-07, 11:39 PM
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been done but if you put those independently suspended cranks on so you kind of were getting even pedal strokes but by the same token you could offset it that would be fun.
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Old 01-03-07, 03:21 AM
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i wanna get a left side drive arm and mount it on a really long bb spindle. i toyed around with this idea and possibly running two gearings and just snapping a different chain on when i wanted to switch gearings.

if i didn't coincidentally have such an amazing chainline i might play around with it a little more.
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Old 01-03-07, 03:46 AM
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chew on this
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Old 01-03-07, 08:34 AM
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dude also has platforms instead of clips and straps, but what a pretty bike
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Old 01-03-07, 08:38 AM
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if you use two freewheels, it would be like a super ghetto "fixie".

edit: "fixie"
use the term loosely in this application.
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Old 01-03-07, 08:41 AM
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Originally Posted by ryand
if you use two freewheels, it would be like a super ghetto "fixie".

edit: "fixie"
use the term loosely in this application.
been done; search FGG for "co-op" and "schwinn" i believe. the rider of it has an interesting write-up of it.
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Old 01-03-07, 08:47 AM
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I know it has been done, I was just throwing that out there.

The funny thing about it is they had to purchase a double sided hub, so why not just use a fixed cog?
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Old 01-03-07, 08:48 AM
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I guess one advantage is since the load is distributed between the two sides, less chance of stripping the cog off the hub. Also some built-in redundancy in case of chain breakage.
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Old 01-03-07, 09:06 AM
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I got 5 bucks that say it reduces frame flex.
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Old 01-03-07, 09:24 AM
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i would assume you want as close as possible to there being the same tension in both chains.
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Old 01-03-07, 09:26 AM
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I don't know how that rides, but it's looks effin' funky.
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Old 01-03-07, 09:31 AM
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it should ride the same as a regular fixed gear. i dont know if there are any benefits to it though, doubt it.
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Old 01-03-07, 09:35 AM
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Originally Posted by TRaffic Jammer
I don't know how that rides, but it's looks effin' funky.
better than one with dual nondrive cranks, that's for sure.
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Old 01-03-07, 09:39 AM
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oh my, best response possible.
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Old 01-03-07, 09:43 AM
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Old 01-03-07, 10:00 AM
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Would it be dangerous with a setup like that, given that the left-side cog would be threaded backwards? (pedalling puts counterclockwise force on the cog)
Or would the correct-side drivetrain just compensate and keep the left-side setup from slipping?
(slipping left side would lock against right side, keeping smooth drivetrain force, keeping the left side from slipping further than the allowable chain slack.)
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Old 01-03-07, 10:26 AM
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how about a having both cranks facing one direction...
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Old 01-03-07, 11:14 AM
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Originally Posted by scotthorrigan
how about a having both cranks facing one direction...
"kangaroo cranks"
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Old 01-03-07, 11:16 AM
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Originally Posted by CliftonGK1
Would it be dangerous with a setup like that, given that the left-side cog would be threaded backwards? (pedalling puts counterclockwise force on the cog)
Or would the correct-side drivetrain just compensate and keep the left-side setup from slipping?
(slipping left side would lock against right side, keeping smooth drivetrain force, keeping the left side from slipping further than the allowable chain slack.)

a fixed/fixed flip-flop with proper cogs and lockrings should be able to handle this whithout problem.
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Old 01-03-07, 11:17 AM
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Originally Posted by jeac
"kangaroo cranks"

ahhh it all makes sense now
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Old 01-03-07, 11:26 AM
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Kinda defeats the 'minimalist' philosophy, but it would certainly be a conversation peice. I guess its a good idea if you want to chew and grease your pant legs symetrically. It would reduce chance of chain snappage which has happened to be a few times, but a brake would ne more effective in that case anyways. I might try it if I had a spare tandem crank lying around.
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