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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 05-20-05, 04:16 PM   #1
raygunner
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Chain Tensioners on a Converted Road Bike?!

Do you need chain tensioners on a road conversion with semi-vertical dropouts?
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Old 05-20-05, 04:19 PM   #2
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you don't need one but I have one on.
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Old 05-20-05, 04:20 PM   #3
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nope, my first conversion didn't have 'em, and it worked fine.
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Old 05-20-05, 04:20 PM   #4
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If you are going singlespeed w/ freewheel, then you could use a tensioner. But if you are going fixed, then you can't use any tensioners, they won't handle the stress of backpressure, and will fail terribly.

Semi-vertical might give you enough adjustment room. If you can move about 1/4" toward the BB, then you have enough adjustment space to make it work, though you may need to play around with gear combos and chain lengths to nail it. Perfectly vertical dropouts may require an eccentric hub (like the white ENO), or other tricks, like supporting a wheel soley on its skewer, filing the dropout back a bit, or using the so called 'magic' gear combos that match chain length perfectly to your axle/bottom bracket distance.

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Old 05-20-05, 04:22 PM   #5
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Hmm, maybe there is confusion, do you mean a wheel tensioner like the tugnuts that pull the axle back and forth? Or do you mean a springy chain tensioner like the surly singlator that adds a pulley to pull on the chain?

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Old 05-20-05, 04:51 PM   #6
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They were like Redline Chain Tensioners (like Surly's Tugnuts). The chap was riding a single speed. I was just wondering since I've never seen that before.
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Old 05-20-05, 04:53 PM   #7
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Use a rear derailleur. It does the same thing.

S/F,
CEYA!
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