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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 01-24-12, 11:56 AM   #1
heiwaz
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how to calculate how many chainlinks I need?

Hello, I want to know how to calculate how many links should be my chain. I saw a chain in ebay that has got 102L, but how to know if will fit to my fixie?
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Old 01-24-12, 11:58 AM   #2
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Hello, I want to know how to calculate how many links should be my chain. I saw a chain in ebay that has got 102L, but how to know if will fit to my fixie?
The easiest way is to count your current chain.
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Old 01-24-12, 01:17 PM   #3
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I haven't chain, sorry. I'm mounting my new fixie, buying all componets.
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Old 01-24-12, 01:25 PM   #4
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First off, is it a used chain ? If so, don't buy it. You don't want to built up a new bike with a used worn chain. Normally, new chains have more links than that.
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Old 01-24-12, 01:27 PM   #5
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Originally Posted by heiwaz View Post
I haven't chain, sorry. I'm mounting my new fixie, buying all componets.
Chain length is a function of chainring and cog sizes, and chainstay length. The best way to determine chain length is to buy a long chain, mount it on your bike and trim as needed.
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Old 01-24-12, 01:40 PM   #6
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And 102L do you consider a long chain?


This mount my fixie:

Chainring: 46T
Cog: 16T
Centro BB to centre rear wheel: 41cm (16")
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Old 01-24-12, 01:41 PM   #7
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First off, is it a used chain ?
It's a new chain
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Old 01-24-12, 01:49 PM   #8
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102 links is not a long chain, however, it should be long enough for your situation.
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Old 01-24-12, 02:39 PM   #9
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yup 46t, sounds like you'll be alright
just to throw an example for you with the kilo tt:
i wanted to buy the wipperman IG8 chain but it only came in 96 links probably cuz its for bmx. ended up being just right for 49T x 17T. and the bb to end of dropout distance on kilo tt is about 16 inches as well.

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Old 01-24-12, 03:24 PM   #10
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I found this website to calculate it:

http://eehouse.org/fixin/formfmu.php

If I used my measures 46T x 16T - 16", suggest me a chainlengths of 48, so the links are 1/2" length I count the double, that's 96 chainlinks.
Please can anyone confirm this is true?, I don't speak english very well and some terms confuse me, thanks.
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Old 01-24-12, 03:27 PM   #11
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Sí, usted está correcto.
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Old 01-24-12, 04:19 PM   #12
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Sí, usted está correcto.
Gracias! (thanks)
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Old 01-24-12, 04:39 PM   #13
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And 102L do you consider a long chain?


This mount my fixie:

Chainring: 46T
Cog: 16T
Centro BB to centre rear wheel: 41cm (16")
Half the chain ring and half the sprocket is covered with chain = 46/2 + 16/2 = 23 + 8 = 31.

Distance between sprockets is 16", there are to lengths of chain that long = 32" and a chain link is 1/2", so you need 64 links for the distance between sprockets.

31 + 64 = 95 links. You should be good with anything over 100.
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