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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 07-19-09, 02:38 PM   #1
tm1210
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Bolt on cog disc hubs

I've been reading up on these alot lately as I think its a good idea. A quick question...

With the XT hub conversions Velosolo do they swap the axle out for a longer M10 170mm standard threded axle. I might be wrong but I'm thinking this kind of axle is only used with cup & cone bearing hubs? I take it you also need to use a longer axle when using a cartridge bearing hub like the Surly? Something like this maybe..

http://harriscyclery.net/itemdetails.cfm?ID=2496

Does anyone have any know how regarding this and know what 6 bolt hubs are compatable for this conversion?
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Old 07-19-09, 02:43 PM   #2
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Any hub is compatible as long as you can get a longer replacement axle for it to compensate for the rear dropout spacing difference.
If you don't mind squishing your dropouts a lot, you could get away with the original axle.
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Old 07-19-09, 02:54 PM   #3
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Should have read up a bit more before posting. Apparently you can use a standard axle for cartridge bearing hubs.

http://www.fixedgeargallery.com/arti...mson/surlyhub/

Think I might give this a go.
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Old 07-19-09, 07:48 PM   #4
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XT front hubs and cones are 9mm, not 10mm, so you'll need new cones as well as an axle.
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Old 07-19-09, 08:24 PM   #5
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Originally Posted by tm1210 View Post
Should have read up a bit more before posting. Apparently you can use a standard axle for cartridge bearing hubs.

http://www.fixedgeargallery.com/arti...mson/surlyhub/

Think I might give this a go.
I did the exact same thing following the same instructions. It worked out perfectly. The instructions mention dremmeling to get the cog to fit. I'm not sure what thats about. I didn't need to dremel anything for a 17t tomicog. With the surly hub and tomicog, I got a 45-46mm chainline, which is what I needed. With a tiny amount of dish you could get it a few mm inward.
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Old 07-19-09, 09:46 PM   #6
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The instructions mention dremmeling to get the cog to fit. I'm not sure what thats about.
The first cog I used when I wrote the article was from Kogswell, a drilled-out Shimano bmx cog. Needed a little clearancing to fit over the Surly bearing rim. I use Tomicogs, now. Drops right on.
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Old 07-20-09, 12:20 AM   #7
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Originally Posted by oldfolksmashers View Post
XT front hubs and cones are 9mm, not 10mm, so you'll need new cones as well as an axle.
negative. XT M755/756 cones(and others)are M10

http://fish.shimano-eu.com/media/tec...9830611908.pdf
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Old 07-20-09, 08:55 AM   #8
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I did the exact same thing following the same instructions. It worked out perfectly. The instructions mention dremmeling to get the cog to fit. I'm not sure what thats about. I didn't need to dremel anything for a 17t tomicog. With the surly hub and tomicog, I got a 45-46mm chainline, which is what I needed. With a tiny amount of dish you could get it a few mm inward.
on some hubs there's a ring protruding around the bearing cup area that is very slightly too wide to allow the cog to rest flush against the mounting surface, so in that case you need to grind around 1mm off of the cog's splines.
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Old 07-20-09, 01:35 PM   #9
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maybe its possible you could get a front touring wheel that has a larger spacing then 100?
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Old 07-20-09, 01:49 PM   #10
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just get a ss disc hub and run if flip flop
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Old 07-20-09, 05:32 PM   #11
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just get a ss disc hub and run if flip flop
Aren't most (if not all?) ss disc hubs 135mm OLD?

plus, chainline gets messy with a bolt-on on a rear hub
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Old 07-21-09, 12:58 AM   #12
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maybe its possible you could get a front touring wheel that has a larger spacing then 100?
Three kinds of front hub:

Standard 9x100mm spacing
Through-axle 20x110mm spacing
Pugsley 10x135mm spacing.
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Old 07-21-09, 01:51 AM   #13
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just get a ss disc hub and run if flip flop
That would be the easiest solution but your talking about a 52mm or there-abouts chainline.
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