Chainline/Bottom Bracket Advice

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  • Hi Everyone,

    I am working on getting my town bike rebuilt after a respray. As I was getting it resprayed (complete w/ original 80s Bontrager decals) I decided to get some shiny new cranks and a new bottom bracket.

    Can anyone advise on the best BB spindle length for the following combination:

    Cranks: Stronglight Track 2000 (1/8" chainring)
    Rear Hub: Surly 130mm
    Sprocket: Dura Ace 1/8"

    If you're running a similar setup, your advice would be great.

    Thanks,
    Eli

  • Search for transmission database

  • That's the first thing I did. It didn't have the info I needed, so I created a new thread.

  • Measure it.

  • Sheldon Brown? Maybe put your query in the transmission database.

  • The rear hub should come with info on the chainline.
    If the cranks use a 107mm JIS bottom bracket to give a 42mm chainline, then you will probably need something a bit longer.
    hmmmm - just read this post, so perhaps just send a PM to eeeehhhhh for more information.
    Then add info to chainline database!

  • Ah, great. That's just what I needed. I'll probably still measure, as the road cranks I was using w/ a 115 BB and chainring in the outside position were too narrow for the Surly hub. But it's good to know that theoretically I should be able to use a 107mm BB.

    Thanks,
    Eli

  • p.s. - 42mm is for a flip-flop according to eeheheeheh, single-sided may be different.

  • i use an eno eccentric hub which has a stupendous 47mm chainline.
    I needed a 118mm BB with Shimano 600 cranks to get the right chainline.
    so u never know.

    best thing is to measure up, and buy accordingly.

    Sheldon Brown has an article on measuring chainlines. Go read and go and do. Best thing ever.

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Chainline/Bottom Bracket Advice

Posted by Avatar for Bluah @Bluah

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