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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)

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Old 10-01-08, 04:11 PM   #1
Steve90068
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Chain Tension for Vertical Dropouts ???

Hey everyone-

First of all, yes i know i should have chose a bike with horizontal dropouts but i didnt so i hope you guys can give me some advice

Currently I have been converting a road bike with vertical dropouts to SS. I am currently attempting to run a 46/16 and I'm having big problems with chain tension. i have two chains that i have been attempting to use, one with a half link, one without.

with the half link the chain tension is so tight it feels like i am peddling through mud, with out the half link there is a lot of chain movment but it has not popped off.

My question is how much of a difference will if make if i run a 44/16 (could that be a middle ground between the two chains?)

thanks a ton!
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Old 10-01-08, 04:15 PM   #2
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It will make a difference, but I would consult your LBS for pointers on this. Showing you how to adjust chain tension is much easier than explaining it (especially on conversions).
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Old 10-01-08, 04:16 PM   #3
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I'd use a surly singleator or a ghost ring. Otherwise it doesn't seem worth the trouble to go singlespeed with horizontal dropouts.

There's also the ENO hub but that's a couple hundred bucks
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Old 10-01-08, 08:23 PM   #4
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There are hacks you can do like filing down your dropouts, or filing down the axle to give youa few mm's of wiggle room. Also, if you are using a cheap chainring there is a good chance that it is not perfectly round, giving you a difference in chain tension throughout the pedal stroke.
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Old 10-02-08, 11:34 AM   #5
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Check this out: http://eehouse.org/fixin/fixmeup.php
http://www.63xc.com/toddp/halflink.htm
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Old 10-02-08, 11:44 AM   #6
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You are looking for what's called a magic gear. This technique can work but it's a pain in the ass and it won't work anymore as soon as your chain stratches. If your chain doesnt' fall off on the loose setting I'd say leave it. If it does start to fall off I would just run a tensioner; it's the simplest of all your options imo and it will look pretty clean if your ratio is as close as you say it is.
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Old 10-02-08, 11:53 AM   #7
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White Industries ENO hub
Worked great for me and looks great too.
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Old 10-02-08, 12:11 PM   #8
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thanks for the advice dudes......im just going to sell the bike and get either a kilo tt or sst

too much trouble....live and learn
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Old 10-02-08, 07:46 PM   #9
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Quote:
Originally Posted by Steve90068 View Post
thanks for the advice dudes......im just going to sell the bike and get either a kilo tt or sst

too much trouble....live and learn
The only real answer to your original question would've been the eno hub.
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