Extra bottle mounts?

superbike Posts: 24
edited October 2010 in Workshop
I only have one bottle mount on my aluminium framed cross bike and wish to add one, has any one ever drilled and tapped their own threads onto a frame and if so what do I have to watch out for?


  • Weejie54
    Weejie54 Posts: 750
    Normally, you need to have bosses fitted. The tube thickness isn't enough to hold a decent thread. I've brazed bosses on to steel frames. Aluminium is another story.
    You might have to go the clamp on route.
  • Thanks, best not to make swiss cheese of my frame! Clamp on? never heard of this way , have you any more info into how and where from, good brands etc.?
  • Yes, wall thickness far to thin to cut threds into.

    A framebuilder might sort you out with some kind of fix.
  • dmch2
    dmch2 Posts: 731
    I wonder if rivnuts would work?
    2010 Trek 1.5 Road - swissstop green, conti GP4000S
    2004 Marin Muirwoods Hybrid
  • chunkytfg
    chunkytfg Posts: 358
    dmch2 wrote:
    I wonder if rivnuts would work?

    I was just thinking 'what about rivnuts' as I read this however I think there would be an issue with the size of the hole you'd need for a 5mm thread size. might work on a cheaper heavier Ally frame as the tubes will probably be thicker but not on something lightweight.
    FCN 7

    FCN 4

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  • dmch2
    dmch2 Posts: 731
    It would be a big hole... But since the top of the tube is in compression (rather than tension) it might be ok.

    I'd rather not be the first to try it though!
    2010 Trek 1.5 Road - swissstop green, conti GP4000S
    2004 Marin Muirwoods Hybrid
  • How about a rear-of-seat mounted carrier like the Tri boyz use ??
    Jens says "Shut up legs !! "

    Specialized S-Works SaxoBank SL4 Tarmac Di2
  • I mounted a bottle cage onto a peice of plastic and screwed it to an old seat tube reflector bracket. I mounted it behind the seat, I did the same for the bars but used a handle bar front reflector bracket.