Advertise on Bikeforums.net



User Tag List

Results 1 to 9 of 9
  1. #1
    Junior Member
    Join Date
    Jul 2007
    Location
    Monterey, CA
    My Bikes
    Cannondale CAAD9
    Posts
    21
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Cannondale Hollowgram Si chainring question

    Hi everybody!
    I'm next to buy '06 Cannondale Six13 Team 1 Compact Drive and got 1 question concerning BB30 crankset. Is it possible to replace 50-36 chainrings to regular one's 53-39 e.g. Shimano Dura-Ace? Does anyone know the exact params of this crankset?

  2. #2
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,782
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Compact cranks almost all use a 110 mm bcd so Dura Ace regular road rings (130 mm bcd) won't fit.

    T/A makes 53 and 39T rings in a 110 mm bcd and Harris Cyclery carries them but this is not an inexpensive change. Look here: http://sheldonbrown.com/harris/chainrings/110.html

  3. #3
    Junior Member
    Join Date
    Jul 2007
    Location
    Monterey, CA
    My Bikes
    Cannondale CAAD9
    Posts
    21
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    HillRider

    Thanks for explanation!
    I think it would be easier to buy BB30 to English BB adapter. Btw do I need special tools to unmount BB30 and install adapter?

  4. #4
    Senior Member
    Join Date
    Feb 2001
    Location
    England
    Posts
    12,074
    Mentioned
    2 Post(s)
    Tagged
    0 Thread(s)
    The BB30 standard seems to be quite a good one. If your bike already has a functioning bottom bracket and crank then all you need do is switch rings and raise the front mech.

    TA make some of the best, most durable rings in 110mm BCD but they are not the only brand. The only 110/compact rings which wont fit are some Campagnolo versions with an odd hole spacing.

  5. #5
    Super Moderator
    Join Date
    Feb 2007
    Location
    Tariffville, CT
    My Bikes
    Tsunami Bikes
    Posts
    11,784
    Mentioned
    9 Post(s)
    Tagged
    0 Thread(s)
    Unsubstantiated but using the standard BB adapter can damage the BB30 shell when you remove the adapter.

    Since the cranks are so light and stiff and already on the bike, changing the rings would probably be the best way of getting your bigger gears.

    cdr

  6. #6
    Junior Member
    Join Date
    Jul 2007
    Location
    Monterey, CA
    My Bikes
    Cannondale CAAD9
    Posts
    21
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The thing is that I don't need compact chainrings, because we mostly have flatlands. The best way will be replacement of the whole crankset

  7. #7
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    24,782
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by samarskyrider View Post
    The thing is that I don't need compact chainrings, because we mostly have flatlands. The best way will be replacement of the whole crankset
    Instead of changing both rings, why not just change the inner ring to a 39T or 42T? Your 50T big ring should provide a plenty high top gear if used with a 12T or 11T smallest cog.

  8. #8
    Junior Member
    Join Date
    Jul 2007
    Location
    Monterey, CA
    My Bikes
    Cannondale CAAD9
    Posts
    21
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    HillRider
    I need the middle part of cassette, so I don't use such gears as 50-11(12). Anyway I refused to buy this bike

  9. #9
    (Grouchy)
    Join Date
    Mar 2003
    Posts
    3,643
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by samarskyrider View Post
    The thing is that I don't need compact chainrings, because we mostly have flatlands. The best way will be replacement of the whole crankset
    if you're referring to the alloy Si cranks, you can get a 130BCD spider from cannondale which will let you use standard 39/53 rings. replacing those cranks with anything else is heresy! also, if you're already talking about replacing the cranks, why not just get the standard double Si cranks instead of going through the trouble of installing the adapter, buying other (inferior, but not by much), cranks. also, once the adapter is installed, you can't really take it back out again without a special press. also, you will need special tools to remove the Si crankset.

Posting Permissions

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