Advertise on Bikeforums.net



User Tag List

Results 1 to 2 of 2
  1. #1
    Junior Member co treker's Avatar
    Join Date
    Jan 2009
    Location
    Longmont co
    My Bikes
    '82Trek 613, '84 Trek 850 antelope (in pieces), half of a santna elan tandem, 02 bianchi eros, '07 LHT
    Posts
    23
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Parts transplant

    Hey folks I need advice on some parts I'm transplanting from an '02 bianchi eros to a 1983 trek 630. The rear derailleur went on fine, had to get a second front brake for the rear due to bolt length problems (brake bridge looked a little narrow to ream out), bb and cranks o.k. The only real sticker is the f. derailleur. See I had the frame powder coated. Did that add enough to the dia. to screw the deal. The seat tubes for the trek have inside diameter of 27.2 The don't know what the outside dia. is. The clamp for the f. derailleur is 28.6mm. It just doesn't quite want to go all the way around the tube. I could possibly use a longer bolt on the clamp, though it might ding the paint job. Is that realistic or do I need a different fd. Thanx.

  2. #2
    Old fart JohnDThompson's Avatar
    Join Date
    Nov 2004
    Location
    Appleton WI
    My Bikes
    Several, mostly not name brands.
    Posts
    11,846
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by co treker View Post
    Hey folks I need advice on some parts I'm transplanting from an '02 bianchi eros to a 1983 trek 630. The rear derailleur went on fine, had to get a second front brake for the rear due to bolt length problems (brake bridge looked a little narrow to ream out), bb and cranks o.k. The only real sticker is the f. derailleur. See I had the frame powder coated. Did that add enough to the dia. to screw the deal. The seat tubes for the trek have inside diameter of 27.2 The don't know what the outside dia. is. The clamp for the f. derailleur is 28.6mm. It just doesn't quite want to go all the way around the tube. I could possibly use a longer bolt on the clamp, though it might ding the paint job. Is that realistic or do I need a different fd. Thanx.
    The nominal OD of your Trek's seat tube is 28.6mm. You'll have a tough time finding one larger than that without going to something egregiously oversized.

    I suspect you'll either have to put up with a ding in the powder coating or ream the present FD slightly to fit better.

    N.B. Once reamed, that FD is unlikely to work on any other frame.

Posting Permissions

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