Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Junior Member
    Join Date
    Jan 2008
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    changing from 7spd to 9spd

    I currently have a Cannondale T-1000 purchased new in 1993 it has been housed the entire time waiting for me to retire and start some touring. Well the time has arrived I will be retiring in approximately 10 months so the planning and purchasing of gear has begun. The Cannondale has a 7 spd Shimano cassette on the back and I'm seriously thinking about purchasing a 9 spd cassette form Harris Cyclery "cyclotouriste 14" I'm thinking I will also need to replace the bar-end shifters that are on the bike now to the Shimano 9spd index/friction bar-ends and maybe a new chain. Any input would be appreciated to this Newbie..thanks Glenn in phx

  2. #2
    slow as I ever was Ex Pres's Avatar
    Join Date
    Dec 2007
    Location
    an imposter living in the 35223
    Posts
    5,786
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    This question has lots of info on the C&V and Mechanics subforums.

    Your first issue will be spreading that aluminum frame from 126 to 130mm.

    Or you can run 8of9 on a 7s freehub.

    Post (or search) in those 2 other subforums
    72 special CNC ______ 72 Frejus (ala Legnano) _73 Holdsworth Record
    80 Ranson__________ 80 unknown French____ 83 Trek 600 (620 styled)
    85 Gianni Motta_____ 90 Miele Gara ________ 02 Casati Dardo #1
    02 Casati Dardo #2 __ 03 Casati Dardo ______ 08 BF IRO (fixed/SS)
    09 Dogma FPX magn_ 10 Vassago Fisticuff (IGH)

    For Sale: _________ 78 Raleigh Professional __ 82 Peugeot PXN10
    85 Trek 560_______ 88 Guerciotti GLX

  3. #3
    Senior Member
    Join Date
    Jun 2004
    Location
    Northern Nevada
    Posts
    3,749
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I'd be reluctant to spread those dropouts, but that may just be my natural distrust of alumuminum--I don't KNOW that it would cause trouble. I've spread steel frames from 126 to 130 a couple of times with no trouble.
    There's no need to change shifters unless you can't use a friction setup. My two main road bikes, an Atlantis and Rambouillet, both use barcons in friction mode (8 spd on the Atlantis, 9 on the Rambo) and shift fine. Indexing is overvalued, IMO--I'm not anti, but for everyday riding, the advantages are tiny if they exist at all.
    If you switch, you will need a new chain, though. I'm almost certain the 7sp chain is wider and won't work. SRAM chains are modestly priced and work great on my bike, plus you don't have to screw around with that Shimano pin.
    Others may disagree, but at least for me, this swap wouldn't be worth the cost. Until recently I had a 7-speed Allez, too, and it didn't give up much compared to the eight and nine on my other bikes. But your choice, of course.

  4. #4
    AEO
    AEO is offline
    Senior Member AEO's Avatar
    Join Date
    Jun 2007
    Location
    A Coffin Called Earth. or Toronto, ON
    My Bikes
    Bianchi, Miyata, Dahon, Rossin
    Posts
    12,255
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Never ever spread aluminum or carbon. They'll be significantly weaker if it survives the ordeal.
    Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
    http://sanfrancisco.ibtimes.com/arti...ger-photos.htm

  5. #5
    Senior Member Retro Grouch's Avatar
    Join Date
    Feb 2004
    Location
    St Peters, Missouri
    My Bikes
    Rans Enduro Sport, Hase Kettweisel Tandem, Merin Bear Valley beater bike
    Posts
    24,012
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Bob Barker View Post
    Your first issue will be spreading that aluminum frame from 126 to 130mm.
    Might not need to. Measure your rear dropouts inside-edge to inside-edge. My 7-speed Bridgestone, from about the same era, was 130mm.

  6. #6
    Junior Member
    Join Date
    Jan 2008
    Posts
    22
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I went to the cannondale vintage site and what i'm reading the dropouts may already be at 135 I'll have to pull the rear wheel and measure. if not then i will not spread the alluminum frame i will take your advise thanks again glenn in phx

Posting Permissions

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