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I broke the derailleur hanger from a Trek 2200 after many years of hard use.  This happened to be a terminal condition for this bike.  Couldn't bring myself to toss it after so many wonderful miles - so it sat around my garage.  Used the top tube and down tube for some other project a few years ago, which left the rear triangle lonely in the corner.  I decided the triangle would make a decent shop stool, just had to make a few pieces and reclaim a seat tube from another spare bike.

Step 1:

Firs step cut out the rear triangle.  This bike already had the top tube and down tube salvaged, I just needed to make a cut closer to the tubes.  This happened to be a carbon tube bike, with aluminum lugs. 

Step 2:

Making a trim cut in the carbon/aluminum is a piece of cake with a saws-all.

Step 3:

A closeup of the rear end, I cut off the derailleur hanger to make the back level.   This proved to be too unstable - needed to have a wider base.  So I built a wider base that fit where the hub used to live.   The brace is built from a couple pieces of scrap wood (walnut).  I drilled a hole through the scrap that fits between the rear triangle and inserted an old quick release skewer to hold it all together.

Step 4:

Next step - making something to sit on.  I happened to have an extra seatpost laying around.  This one is a Dura Ace 25th anniversary edition - way too nice for a shop stool but the only one not in active use - oh well.  Took a piece of 1 inch white oak and drew a rough outline of a bike seat and cut on the bandsaw.  Took the seatpost assembly apart and only used the post and bottom adjustment bracket - screwing from the bottom into the seat.  Just insert the seatpost and set to your preferred height.
why not use an actual bicycle seat for the seat?
Totally friggin sweet! Unloved bikes are everywhere!
Great idea! Thanks!!!!! <br>
This is pretty cool. Are there any plans to add casters?

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