Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Junior Member
    Join Date
    Mar 2008
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Will this BB fit my frame?

    I ordered a Surly Cross Check frame (hasn't arrived yet) and the BB specification from the website says the BB is 68x113mm, the BB I have is a 68x107mm with a square taper spindle. Is 6mm going to cause any problems with my crankset? Thanks for the help!

  2. #2
    Senior Member
    Join Date
    Apr 2006
    Posts
    2,195
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    Probably but you will not now until you try it. Roger

  3. #3
    Senior Member Bill Kapaun's Avatar
    Join Date
    Feb 2007
    Location
    Mid Willamette Valley, Orygun
    My Bikes
    86 RockHopper,2008 Specialized Globe. Both upgraded to 9 speeds.
    Posts
    7,136
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Why would you replace a new BB?

    It kind of depends on how well yours might work.
    Is it going to be a double or triple?
    How "symmetrical" is your BB? That seems to vary somewhat. If 1/2 of the 6mm difference is on the NDS, then the DS will also be 3mm longer. That's only 1/8"! It might be an improvement???
    What rings/cogs will you be using the most?

  4. #4
    Low car diet JiveTurkey's Avatar
    Join Date
    Aug 2007
    Location
    Corvallis, OR, USA
    My Bikes
    2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
    Posts
    2,393
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    68 refers to width of the BB shell in mm, so yes, it will fit. The spindle length (107mm, 113mm, etc) is determined by the crank. If you'll be using the original crank, then it will alter the chainline. But, if you have a matching crank, then, well, it will match. Edit: since you said you bought the "frame" you may not have an "original" crank. Anyway, just match the spindle length to the crank you'll be using and you'll be good to go. The frame won't care what the spindle ultimately is, only that the threads and width (English, 68mm) are correct.

  5. #5
    Junior Member
    Join Date
    Mar 2008
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    well the frame did not come with a BB, it is a used frame. And the crank I am using only has 1 chainring, this is the crank I bought: http://cgi.ebay.com/ws/eBayISAPI.dll...MEWN:IT&ih=024

    Since the spindle is shorter (107mm) than the specifications on Surly's website (113mm) I was worried about the crank arm fitting all the way onto the spindle on the drive side and being able to tighten up. I was just wondering if anybody knew for sure that this will not work so I can go ahead and order a new BB while I'm waiting for my frame to arrive. Thanks for the responses.

  6. #6
    Senior Member
    Join Date
    Dec 2004
    Location
    Athens, Ohio
    My Bikes
    Custom Custom Custom
    Posts
    5,104
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Well since you are running single ring, it'll probably work. You could probably even go shorter

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •