Old 02-20-18, 11:04 AM
  #13  
pesty
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I would recommend AGAINST drilling an Aluminum frame even more than I would against drilling into carbon. Any hole in the wall of AL tubing is just asking to develop cracks and structural failure if not done properly. That's why you don't see many AL frames with internal cable routing, and when you do, it's on higher end frames and often with additional support welded/bonded in place.

If that frame will only ever see life on the trainer and will NEVER see road use again... fine, do it at your own risk and it probably will survive, but I would do it under the assumption that if you drill it the way that I think you're wanting to, it's a dead frame and should never be ridden on the road again.
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