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Single speed hub to geared?

Old 12-23-12, 02:36 PM
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Single speed hub to geared?

Is there any difference between say a Surly thread on hub and the old school hubs with 5 and 6 speed freewheels?
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Old 12-23-12, 03:53 PM
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The larger diameter "fixie" thread and the freewheel side thread is the same as the thread on 5/6/7 speed freewheel hubs.

However, watch old with old Campy and Zeus french parts...

FBinNY can tell you how much you can get away with on Campy hubs - old French hubs will be the real sticking point.

=8-)
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Old 12-23-12, 04:38 PM
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I believe the dish on the wheels is different.
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Old 12-23-12, 04:46 PM
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Originally Posted by Flying Merkel
I believe the dish on the wheels is different.
Starting with bare hubs, the spacers can be rearranged to give whatever is necessary.
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Old 12-23-12, 04:51 PM
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Question was about threading folks...not spacing.

=8-)
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Old 12-23-12, 04:52 PM
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Originally Posted by mrrabbit

FBinNY can tell you how much you can get away with on Campy hubs - old French hubs will be the real sticking point.

=8-)
The only issue would be with Italian thread Campy hubs. These are rare birds in the USA, since Campy shipped only English thread hubs to the USA, and to OEMs producing bikes for the US market. I've seen a handful of the Italian, usually when someone goes and buys a bike in Italy.

So there shouldn't be an issue using a road hub shell for a single speed freewheel setup. However road hubs are totally unsuited for fixed gear use, since there's no reliable way to secure a fixed sprocket when there's no reverse thread lockring.
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Old 12-23-12, 06:55 PM
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Yeah actually I'm looking to convert my single speed to a 5 speed geared bike. Oh yeah it has horizontal drop outs.
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Old 12-23-12, 07:09 PM
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Depending on whether you do your own work, and whether there's any possibility of ever wanting to go SS again, you might prefer to buy a new wheel rather than modify this one.

The conversion is doable, but you'll need to switch around axle spacers, or maybe even a new axle. You'll also need to re-dish the wheel about 5-8mm toward the right. This may be a problem on an older wheel that might have nipple corrosion. If the spokes are on the long or short side, you may have issues because you'll need about 1mm longer on the left, and shorter on the right, so here's the risk of running out of workable length if the current build runs to one side already.

There's also the question of going freewheel vs. freehub. Though I still ride freewheels, if starting fresh I'd go cassette to be in line with index systems and component availability.

So, while the conversion is possible, give some thought to what your plans are, and compare the costs of converting vs. replacing the wheel, then compatibility with whatever derailleur system you're considering.
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Old 12-24-12, 02:24 AM
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Also, by horizontal dropouts, do you mean dropouts that open forward, or track-style ones that open backward? If the former, it'll be fairly easy to get hold of an adaptor claw to bolt the derailleur to, but if you have track ends, I think there is an adaptor, but I'm not sure where you'd find it.
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Old 12-24-12, 04:24 AM
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The Surly hubs have wide flange spacing for a higher spoke bracing angle. You can replace the axle with a longer one, dish the wheel, and put on a multi-speed cluster, but you'll end up with very high locknut spacing.

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Old 12-24-12, 11:35 AM
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yes the Derailleur hub is narrower, the right end sticks out further to make room for 5 cogs
[use off road, expect broken axles] then you have to kludge in the whole rear derailleur install..

Think internally geared hub instead of derailleurs and the change over is simpler.

there are 5 speed IGH. 7,8 11 and 14 speed too .. and one that is continuously variable..

Last edited by fietsbob; 12-28-12 at 10:43 AM.
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Old 12-25-12, 06:13 AM
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My frame does have track ends, sounds like it might be better to just leave it single speed for now. Hub gears aren't an option because I still use it as a mountain bike.
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Old 12-25-12, 07:06 AM
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Originally Posted by BBQ Biker
Hub gears aren't an option because I still use it as a mountain bike.
A number of mountain bikes have hub gears, mainly the Shimano Alfine hubs. The option is available.
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Old 12-25-12, 12:42 PM
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Hub gears aren't an option because I still use it as a mountain bike.
The Rohloff is used often for Mountain bike races, particularly Endurance Events..

maybe you just need to N+1, want a geared mountain bike, go to a Bike shop & Buy one..

Last edited by fietsbob; 12-28-12 at 10:35 AM.
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Old 12-28-12, 10:23 AM
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Originally Posted by BBQ Biker
My frame does have track ends, sounds like it might be better to just leave it single speed for now. Hub gears aren't an option because I still use it as a mountain bike.
I've taken my 3-speed off road before and it held up fine. In fact, I'd say that hubs are actually ideal for mountain biking, since there's nothing hanging off the side of the bike to get bashed up, and the chain can be enclosed to keep it clean. If you're used to riding a single-speed, a 3 or 5-speed hub would be fine for your needs. Old sturmey-archer hubs are virtually indestructible if looked after properly.
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