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Can I disassemble a free wheel sprocket and use it as a single speed sprocket or I have to buy a single speed sprocket?

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There are multiple options.

  1. Just use one cog and don't change gear. Cheap and easily reversible.
  2. Remove and store your rear derailleur/shifter/wires, and then trim your chain to length so it only suits one cog. This may require a chain tensioner and risks dropping the chain off, if the chain line isn't good.
  3. You can get single-speed kits that fit on a freehub, essentially a cassette with one cog and spacers for either side. Since the horizontal placement is adjustable, you should be able to get a better chainline. If you only have a freewheel, this is not an option.
  4. The expensive solution is to get a single-speed wheel, or rebuild your existing rim onto a single-speed hub. This may give you a flip-flop setup where each side of the bike has a different gear, or the choice between a fixed-gear and a single speed.

It really depends if your frame has track ends (probably not if it has a derailleur) or some other way to set the chain tension.


Remember you still absolutely need working brakes, front and rear. Don't remove them in your quest.


Personally I just ride with my gears - the 1935/6 Tour de France riders petitioned long and hard to be able to use gears!


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  • 1
    How do you know it's a cassette hub?
    – ojs
    May 19 at 7:03
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    @ojs: Hint one: the lock-nut for the cassette is easily visible. Hint two: anything with 7 and more cogs is a cassette. There some rare 7-speed free-wheels in this case check for a lock-nut.
    – Carel
    May 19 at 9:59
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    @Carel okay, I don't see any pictures or mentions of number of speeds in the question
    – ojs
    May 19 at 10:09

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