Bottom bracket sizing

bramstoker
bramstoker Posts: 250
edited May 2009 in MTB workshop & tech
Im loosely following sonics guide to build your own hard tail
http://www.bikeradar.com/forums/viewtop ... rame+build
and im a little lost on bottom bracket sizing, found a fair deal on a crankset on ebay but with no bb. I started to search ebay for a octolink bb, i found loads but there seems to be mutiple sizes, so how do i mearure? I know the width of the frame is 68mm but how do i find the axel size? :?:
A feather is kinky, a whole chicken is just perverse.

Comments

  • nicklouse
    nicklouse Posts: 50,673
    what cranks?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bramstoker
    bramstoker Posts: 250
    Hi
    Its the 2008 Shimano Deore FCM440 9 Speed Splined Taper Crankset
    Was just going to go with the hollowtec stuff but if i can save a £ or 2 im happy with these.
    A feather is kinky, a whole chicken is just perverse.
  • nicklouse
    nicklouse Posts: 50,673
    sorry is a splined Octalink fitting or is it a Square taper fitting?

    the FC M440 comes in either fitting.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bramstoker
    bramstoker Posts: 250
    Hi nick

    2008 Shimano Deore FCM440 9 Speed Splined Taper Crankset

    * Splined Drive - 8 Pin Shimano Octalink System

    :D
    A feather is kinky, a whole chicken is just perverse.
  • nicklouse
    nicklouse Posts: 50,673
    So it is the Octalink crankset.

    Not the Square taper crankset.

    Ok does not seem to be one that needs a crazy long axle to give a normal chain line.

    So 113mm for a 47/50mm chain line.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • bramstoker
    bramstoker Posts: 250
    Cheers
    Youve shed some light on it and after some reading up on parktools ect i feel a little more enlightened :)
    A feather is kinky, a whole chicken is just perverse.

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