I just installed an adjustable threadless stem for a friend of mine who
wanted more rise than the stem which came with the bike had. He
couldn't raise the old stem because the steerer tube was only as long
as the height of the stem.
He insisted I keep the old stem as he had no use for it.
What to do with a threadless stem when all your bicycles use quill
stems?
Why, use it to mount a handlebar bag behind the seatpost as a seat bag!
I shimmed the 1-1/8 th in. threadless stem to fit my seatpost.
Next I fastened an old handlebar to it.
Then I mounted the handlebar bag to check for thigh clearance.
Here's a link to a image of it.
All I need to do now is cut the handlebars down and cap them.
This is great as the weight in the handlebar bag will not affect
steering and it freed up the handlebar for a water bottle mount.
I use Profile resin cages. The one on the handlebar is a great place to
place a hot cup of coffee on an early morning ride.
Cheers from Peter