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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 10-20-08, 10:20 AM   #1
infinkc
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going from 48t to 49t, anyone know how much that affects chain length?

im going to a 49t chainring instead of my 48t since i bought a new crankset. Crankset only comes in 49t. I was wondering how much length 1 tooth is going to add on my chin line, right now my 48 is almost adjusted at the min, so im affraid going 49t i will have to get a new chain.
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Old 10-20-08, 12:22 PM   #2
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im going to a 49t chainring instead of my 48t since i bought a new crankset. Crankset only comes in 49t. I was wondering how much length 1 tooth is going to add on my chin line, right now my 48 is almost adjusted at the min, so im affraid going 49t i will have to get a new chain.
If you are replacing the chainring, you might as well replace the cog and chain too. The chainring is the more expensive part of the equation and the one that is going to last the longest so it just makes sense to start off all new.
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Old 10-20-08, 12:29 PM   #3
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i say it'll take up another link or 2...you don't need a whole new chain...just add more links to your existing chain...
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Old 10-20-08, 12:39 PM   #4
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It will bring your axle 1/4" forward in the dropouts.
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Old 10-20-08, 01:09 PM   #5
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It will bring your axle 1/4" forward in the dropouts.
+1 Each link is 1/2" so an extra tooth will result in a shift forward by half of that since the chain is wrapped on both side of the chainring.
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Old 10-20-08, 01:10 PM   #6
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The correct answer is that the distance will vary for different ratios. For your set up, probably around 1/8 of an inch. I would doubt you would need to replace your chain.
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Old 10-20-08, 04:26 PM   #7
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This is an approximation if you do the maths, it will be less than 1/4 inch
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Old 10-20-08, 05:20 PM   #8
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I say -1/8". Just did it 2 minutes ago.
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