Advertise on Bikeforums.net



User Tag List

Results 1 to 9 of 9
  1. #1
    Senior Member
    Join Date
    Sep 2007
    My Bikes
    3Rensho Aero with 10 speed Centaure / Record , Lecroco , whatever bike I have for sale at the moment
    Posts
    686
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Bianchi superleggera help !

    Hello, just bought this bike and noticed a crack on the seat tube lug, I was wondering if this could be fixed and if the frame would then be safe to ride. I was thinking of drilling a hole to stop the crack and then fill it with mastic epoxy.

    I am not terribly thrilled by this purchased and paid the $100 mainly for the rear derailleur and shifters (is that a first gen c-record?). Oh and is this what you guys call a death stem? Just thought it would be good to know !

    Thanks a lot for any help and feel free to comment !







  2. #2
    Senior Member
    Join Date
    Nov 2006
    Location
    TORONTO , ONT , CA
    My Bikes
    '86 AMBROSI / C RECORD. PINARELLO MONTELLO / FRAME, FORK.
    Posts
    746
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yup, looks like C-Record to me.

    Regards,
    J T

  3. #3
    Senior Member Gary Fountain's Avatar
    Join Date
    Sep 2005
    Location
    Hervey Bay, Qld, Australia.
    My Bikes
    Colnago (82, 85, 89, 90, 91, 00, 03), 85 Cinelli, 90 Rossin, 83 Alan, 82 Bianchi, 78 Fountain, 2 x Pinarello, Malvern Star (37), Hillman (70's), 80's Beretto Lo-Pro Track, 80's Kenevans Lo-Pro, Columbus Max (95), DeGrandi (80's) Track.
    Posts
    2,194
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I've never seen a lug crack. I would take the seatpost out and have a closer look (although you've probably already done that). Are you sure the lug has cracked?

    If it was my frame I'd have a go at brazing it. If it gives way what could happen? If the top of the lug does give way perhaps the seatpost could slip down the seat tube. the seatpost is quite a safe distance into the seat tube. I don't think the seat, seatpost and you are going to be thrown backwards off the bike.

    It's up to you but I'd try to repair it (if it is cracked).

    Gary.

  4. #4
    juneeaa memba!
    Join Date
    Oct 2003
    Location
    boogled up in...Idaho!
    My Bikes
    Crap. The box is not big enough...
    Posts
    5,611
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    A superleggera is a fine bicycle, well worth saving. I have never heard of anyone epoxying a crack back together; but it might work. The challenge is to get the crack propagation to cease. it is normal, I believe, to drill a small hole at each end of the crack...

  5. #5
    feros ferio John E's Avatar
    Join Date
    Jul 2000
    Location
    www.ci.encinitas.ca.us
    My Bikes
    1959 Capo; 1980 Peugeot PKN-10; 1981 Bianchi; 1988 Schwinn KOM-10;
    Posts
    14,838
    Mentioned
    6 Post(s)
    Tagged
    0 Thread(s)
    I wonder whether someone in years past tried to force an oversized seatpost into that frame, or whether a tall and heavy rider just put too much internal torque on the lug. The more seatpost I could maintain inside the seat tube, the less I would worry about safety in case of a lug failure, but I would monitor that crack after every ride.
    "Early to bed, early to rise. Work like hell, and advertise." -- George Stahlman
    Capo [dschaw'-poe]: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger, S/N 42624
    Peugeot: 1970 UO-8, S/N 0010468
    Bianchi: 1981 Campione d'Italia, S/N 1.M9914
    Schwinn: 1988 Project KOM-10, S/N F804069

  6. #6
    Senior Member ollo_ollo's Avatar
    Join Date
    Nov 2003
    Location
    Stayton, OR
    My Bikes
    Torelli, Bianchi Trofeo, De Rosa, Specialized Expedition Touring, Colnago Cross, Motobecane Grand Jubile & Grand Record, Miyata 710, 2 Titans, Raleigh Super Course, 3Rensho
    Posts
    3,476
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Have a frame builder take a look at it. From the fuzzy picture I can't tell if that is a crack or a scratch that has rusted.
    visit my homebuilding blog: www.monoplanar.blogspot.com

  7. #7
    Senior Member
    Join Date
    Sep 2007
    My Bikes
    3Rensho Aero with 10 speed Centaure / Record , Lecroco , whatever bike I have for sale at the moment
    Posts
    686
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    thanks for your help! I looked at the other side of the frame and saw that the crack is much longer than I thought.I dont see any defect inside the seat tube. I will probably strip the paint in around the crack to see how bad it is, I think its dead ...




  8. #8
    Senior Member Gary Fountain's Avatar
    Join Date
    Sep 2005
    Location
    Hervey Bay, Qld, Australia.
    My Bikes
    Colnago (82, 85, 89, 90, 91, 00, 03), 85 Cinelli, 90 Rossin, 83 Alan, 82 Bianchi, 78 Fountain, 2 x Pinarello, Malvern Star (37), Hillman (70's), 80's Beretto Lo-Pro Track, 80's Kenevans Lo-Pro, Columbus Max (95), DeGrandi (80's) Track.
    Posts
    2,194
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yep - it does look pretty serious - I wouldn't ride it either. But I would take it to a frame builder and see if a brazing job would repair it. It is a lovely frame - I can understand your disappointment.

  9. #9
    Senior Member
    Join Date
    Sep 2007
    My Bikes
    3Rensho Aero with 10 speed Centaure / Record , Lecroco , whatever bike I have for sale at the moment
    Posts
    686
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah , It would have been a great frame to put the 9 speed dura ace group I have , I was thinking of having it powder coated red and paint the headtube white , I guess Ill stick with the Limongi frame I have. I'll keep the fork but if someone is near montreal Quebec and wants the frame ,once I am done removing the parts, I will probably give it away.

Posting Permissions

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