Old 05-20-19, 06:47 AM
  #22  
Retro Grouch 
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Bikes: Catrike 559 I own some others but they don't get ridden very much.

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This is a question that comes up periodically. If you are working on a bike made with a water pipe frame, you might be able to drill and tap the frame tube. For any butted tubing frame bike, the frame tube walls are so thin that isn't going to work. You'll need the reinforcing the rivnut provides.
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