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Could I turn my current MTB into a singlespeed?

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Could I turn my current MTB into a singlespeed?

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Old 02-19-06, 08:39 PM
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Chone
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And how much would it cost me? I'm loking into buying a new bike (probably a Hardrock Sport) and I was thinking that maybe I could turn my old KHS Sport into a singlespeed so I can have an SS and MS bike, could I do it? what would I need (hubs, chain?)? and how much would it cost me? also how much weight would the bike lose?

What use can I give the existing derailleurs? It currently has 7-speed Shimano Deore XT Rear and I think some generic Shimano Front, Deore XT apprently is a high quality derailleur (I can't imagine how my KHS Sport ever got it) and I would not like seeing it go to waste.

And could someone enlight me more on single-speeds? I'm interested in them because I swift gears very little and I like the idea of having a really light bike for dropping off walls and jumping and stuff but what are the advantages and disadvantage of it versus a multi-speed bike, I don't play to have a SS exclusively, I'll only turn my KHS into an SS if I can and when I get the new bike.

Thanks in advance.
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Old 02-19-06, 08:52 PM
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yes you can do it. There are various ways. The best way is to get a White Industries Excentric Hub and probably one of their sweet freewheels too. The more normal way is to buy a cog and spacers, or tear apart your cassette and make spacers from PVC pipe or any combination of that, use the spacers to adjust chainline, shorten your chain as much as possible, get one of the many tensioners, paul, surly, dmr, etc. and have at it. If you have a freewheel hub, you may have to do some math figure out your chainline for the front and respace and redish your rear wheel. Not a big deal if you know how. Either way. It can cost as little as the pipe for spacers if you're lucky.

You can use your existing rear derailleur as a tensioner, and you can just get rid of the front derailleur, it's useless.

The advantage is simplicity. That's it. No chain slap, no gear shifting, no chain suck, no ghost shifts, no bent derailleurs, no broken shift cables, no questions. If set up properly they are very reliable, no nonsense. And when I say set up properly, on a bike with vertical dropouts it's all in chainline. The tensioner makes up the rest.

A normal XC gearing for a 26" wheel is 2:1, i.e. 32,16
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Old 02-19-06, 09:35 PM
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Here's my GT conversion. It has vertical dropouts, which make it tricky to get chain tension right, but with a half link and a Singleator(or any tensioner), the chain stays put. That's a cheap-o Nashbar SS hub.

PS: it's 32x16 with a 175mm crank
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Old 02-19-06, 09:39 PM
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Originally Posted by alcahueteria
If you have a freewheel hub, you may have to do some math figure out your chainline for the front and respace and redish your rear wheel.
i don't get it? if you had a free wheel hub, wouldn't your wheel already be dished appropriately?
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Old 02-19-06, 11:04 PM
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Originally Posted by mx_599
i don't get it? if you had a free wheel hub, wouldn't your wheel already be dished appropriately?
Chain line is different than dish. Dish makes room for the freewheel. In order to get a good life span from the chain and proper chain tension, you need to work with spacers on a freewheel to get a good chainline. The best chain line is straight, no diagonal lines.
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Old 02-19-06, 11:06 PM
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Also, some people (like me) will make a SS out of a 5/6/7 speed bike with freewheel. Those hubs are spaced so that they are towards the non-drive side so they can fit all the cogs they have. Well when you only have one, all of a sudden there's a lot of space left over and thus respace.

Once you've respaced you're rim is still in the same position relative to the hub, but since your hub has moved relative to the bike so has the rim, but the rim needs to be centered in the bike and thus redishing.
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Old 02-19-06, 11:14 PM
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go here:

http://www.mtbr.com/faq/ssfaq.shtml
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