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Old 09-17-08, 04:58 PM   #1
juggleaddict
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double chain drive

does anybody have pics of this? simply a bike (probably single speed or fixed gear) that has a chain on both sides?

if not, got any left hand drive pics?
. . . . not picture flipped : P

my curiosity is killing me, it has to have been done before, and i looked down today and realized. . . . i want to make one, cause it's not symmetrical and i'm OCD : (
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Old 09-17-08, 04:59 PM   #2
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i mean, i already have the flip flop hub on the back, how would it work in the front?
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Old 09-17-08, 05:27 PM   #3
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with a flip flop hub, the left side threads might be so the cog or freewheel threads off when pedaling, maybe? but you could do an ss rear disc hub and have a fixed cog on the left so you don't have to worry about the treads and have cassete cog/freewheel on the right.

not sure if that makes sense, but this is the first time i've thought about this
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Old 09-17-08, 05:56 PM   #4
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I've seen a post or two on it, and photos, not sure where, though.
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Old 09-17-08, 06:00 PM   #5
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http://fixedgeargallery.com/2007/sept/2/SH.htm#image_3

if they are both fixed cogs, it eliminates tortional BB flex

if they are both ss, it turns the bike into a fixed gear.

(forward on one side, backwards on the other)
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Old 09-17-08, 06:02 PM   #6
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and a different kind of crazy drive train is this one

Retro Direct seen outside my local LBS

you go forward either way you pedal.
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Old 09-17-08, 08:44 PM   #7
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O.o . . . . so if you go up a hill, you simply pedal backwards to make it easier :-d awesome!

ok, now we have to find kangaroo bikes, with both pedals at the same time, . . . with excentric wheels (off center) . . . they make unicycles like that you know ; )


i would actually consider the double chain drive though !!! that looks sick, thanks for the pics bakaster!! : D
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Old 09-17-08, 08:54 PM   #8
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That Moth with the double drive is just sweeeeet.

So what would it take on the rear hub to do that? You'd need a flip flop hub and a couple of cogs right?

could it be done as a freewheel? you'd need a normal freewheel and a reverse recheting one.. does a reverse racheting freewheel exist or could it be modified?

or could you just recut the threads on the left side of the hub to go the other way and use a ton of threadlocker?
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Old 09-17-08, 09:41 PM   #9
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gorilla glue!!
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Old 09-17-08, 09:43 PM   #10
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I know in the bmx world they have a Left Side Drive (LSD) freewheel. They use them so that you can run your drive train on the side you don't grind on. You could run that freewheel on the left and a standard on the right.

check danscomp.com i'm sure they have them.
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Old 09-17-08, 11:02 PM   #11
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"ok, now we have to find kangaroo bikes, with both pedals at the same time"

On the unicycles with square tapered cranks, you can just take a crank off and rotate it 90 degrees or 180 degrees and put it back on- doesn't take anything special. I assume you can do this on most bikes, too, assuming they don't have ashtabula cranks. Of course, if it's not fixed, you couldn't do much with it.
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