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  1. #1
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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.

  2. #2
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    Quote Originally Posted by infinkc View Post
    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.

  3. #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...

  4. #4
    surly old man jgedwa's Avatar
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    It will bring your axle 1/4" forward in the dropouts.
    Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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  5. #5
    big ring MIN's Avatar
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    Quote Originally Posted by jgedwa View Post
    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.

  6. #6
    Team Beer Cynikal's Avatar
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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.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  7. #7
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    This is an approximation if you do the maths, it will be less than 1/4 inch

  8. #8
    One skid from blown knees bigbris1's Avatar
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    I say -1/8". Just did it 2 minutes ago.

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