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Old 02-24-09, 10:23 AM   #1
Lebowski
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a 3 by 1 ?

i was wondering if its mechanically feasible have one gear in the back and switch between the front 3 chain rings

as apposed to a 1x8 setup
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Old 02-24-09, 10:27 AM   #2
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If your one gear in the back was centered with the middle gear in front.
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Old 02-24-09, 10:37 AM   #3
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Sure, just use a singlespeed chain tensioner on the rear.

Irony, though- A cheap old derailer would be cheaper than most singlespeed tensioners.
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Old 02-24-09, 10:43 AM   #4
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Also rear shifting usually performs better than front shifting...

But, as others have said, with a chain tensioner, it should work.
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Old 02-24-09, 11:27 AM   #5
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I'm thinking it would be harder to do than it sounds. All of the single speed freewheels that I'm aware of require a wider chain. That's going to complicate your front derailleur operation and it may not work with your chain tensioner hardware either.
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Old 02-24-09, 11:32 AM   #6
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Originally Posted by Retro Grouch View Post
I'm thinking it would be harder to do than it sounds. All of the single speed freewheels that I'm aware of require a wider chain. .
What.

Shimano makes a perfectly good 3/32 freewheel $20, dicta, ACS. All fairly inexpensive and easiily acquired. Lots of cheaper/more expensive options as well (ENO). Not rare or hard to find by any stretch of imagination.

Since the OP doesn't want to be clear on his question, we can only assume he's either stacking a singlespeed freewheel on a freewheel rear wheel or he's using a freehub type rear wheel with cogs from a cassette spaced out. At which point the freewheel question is moot.

Who knows.
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Old 02-24-09, 12:40 PM   #7
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A friend has this setup on his xtra-cycle with a Paul Melvin chain tensioner (insane overkill IMHO, but it's his bike) and a vintage Suntour thumb shifter. You'd have to use a tensioner with a spring that can take up the chain slack, but like Raiden said, any rear derailluer would work it you can stand to look at it.
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Old 02-24-09, 01:02 PM   #8
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Originally Posted by Retro Grouch View Post
I'm thinking it would be harder to do than it sounds. All of the single speed freewheels that I'm aware of require a wider chain. That's going to complicate your front derailleur operation and it may not work with your chain tensioner hardware either.
BMX single freewheels are available for 3/32" chain.
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Old 02-24-09, 01:51 PM   #9
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Most SS tensioners will not pull enough chain to work correctly. Actually an old RD is a better solution for this setup. That being said, a small stack of 3 cogs in the rear will shift much better but won't give you that same range.
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