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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 04-19-14, 08:16 AM   #1
Sito
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Convert old Campa hub to single-speed (chain line problem)

Hi there

sorry, this is probably a singlespeed-newbie question but have not found an answer yet and thought I'll ask here before I bite the bullet and order a new rear wheel. I am in the process of converting my old 80s Ciocc Italian Road bike to singlespeed and have a problem with the rear wheel. It is a very old Campa hub for screw-on freewheels (not cassettes), so it's easy to screw on a single-speed freewheel. However, it has currently a 7-speed freewheel on it and the spokes are aligned accordingly.

So, if I screw a singlespeed freewheel on there that'll mess up my chain line, correct? Because the single cog will be roughly in the same position as before the largest cog of the freewheel, right? So in theory I would have to recenter the axle and wheel. I can't do that myself though and don't think it's worth to pay somebody to do it for such an old wheel.

So my question is is there any other option to get the single-speed freewheel into the right position to have an acceptable chain line? Some sort of adapter or anything like that. I've seen the singlespeed conversion kits for cassette hubs. Does anything like that exist for the type of hub I have?

Any advice will be much appreciated. Thanks!

Lars
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Old 04-19-14, 06:30 PM   #2
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Ok, thanks, yes, I knew that is the cheapest way...if you know how to re-dish a wheel. So the question is, is there are more expensive way of using the wheel that avoids the whole re-dishing business?
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Old 04-19-14, 06:41 PM   #3
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Put the chainring on the inside, set up a good tensioner, and stop worrying about it.
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Old 04-19-14, 10:51 PM   #4
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Seeing you're only using SS ie, a freewheel, chainline is a non-issue. Did you have the chain flying off the cog that now sits where your freewheel will eventually sit? Of course no (unless you used the shifter of course).

Redishing the wheel is a simple job and can be done on the bike. Screw on your freewheel. Swap the spacers on the axle from one side to the other to establish a straight chainline. Take the opportunity to re-lube the bearings. This will put the rim off to one side of the frame. Simply adjust the spokes to centre the rim in the frame using the brake pads to check how true you have the wheel. Sheldon Brown has an article on it - Fixed Gear on the Cheap The bit you want is down the page a bit but it's all good stuff. You don't need to change spokes and is easily reversible. I've done it a few times (now I use a wheel truing stand but only because I've got one now, I didn't in the early days).
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Old 04-21-14, 06:27 AM   #5
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Thanks, I might just give it a try then, after ll there's nothing to lose
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