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How to cut a carbon steerer tube?

Discussion in 'Bicycle Mechanics and Repairs' started by TheDoctor, 4 Jan 2008.

  1. TheDoctor

    TheDoctor Man-Machine Staff Member

    I've cut alloy steerers - new blade, mitre box, measure 3 times, saw, job done - but what's the best thing to cut carbon ones with?
    I'm concerned about delaminating the edge, and I know to wear a mask. I like my lungs to work!:smile:
  2. Smokin Joe

    Smokin Joe Legendary Member

    A whack with a fecking great hammer and a cold chisel is as good as anything, but if you want to do it the namby pamby mechanics way then use a new, good quality hacksaw blade. A bit of insulating tape over the cutting area is said to stop the lacquer chipping off as you saw, and a bit of emery to clean the edge up afterwards.

    For a straight clean cut use an old stem as a guide.
  3. Dave5N

    Dave5N Über Member

    That is the worst advice I have ever read on a cycling forum.

    You don't need to go to all that trouble. Just scratch it a bit in the right place and bend it across yer knee 'til it snaps.

    You lot fuss too much over your so-called space-age bike bits.
  4. longers

    longers Veteran

  5. yenrod

    yenrod Guest

    I would tape it then saw but maybe thats wrong.
  6. Steve Austin

    Steve Austin The Marmalade Kid

  7. ColinJ

    ColinJ Hillfinder General

  8. CarnageAX

    CarnageAX New Member

    Lancashire, UK
    I work with carbon fibre every day in the aerospace business and it will be fine to use a hacksaw ... no delaminations clean accurate cut every time.
  9. Number14

    Number14 Senior Member

    Don't cut it at all.

    Just get lots of different colour/material spacers and you'll have plenty of opportunity to "bling" your bike. :tongue:
  10. OP

    TheDoctor Man-Machine Staff Member

    So just chewing it off isn't the best bet?:tongue:

    Cheers everyone. While I love the idea of a dirty great stack of spacers, I'll probably be boring and get a hacksaw to it.
  11. simonali

    simonali Über Member

    Really high handlebars are in fashion, aren't they? :biggrin:

    I watched one being done once and they used a clamp on guide and a boggo hacksaw. May've been a 32tpi blade, but I can't remember that much detail.