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PhilDAS
platypus
So, this is what happened.
Bike is a Koga tourer, 1” threaded HT.
Removed old quill stem, SR, had been in there for 3 years at least, well greased and came out easily.
Put in new longer quill stem, 3ttt, tight fit but not impossible. Checked diameter as 22.2mm, same as the SR.
Loosened the bolt and pushed some more, banged it with a hammer and got it in to roughly the minimum insertion point. Plenty of grease used.
Tightened everything and went for a 50k ride, nothing untoward happened.
Today, felt bad about having used hammer. Tried to remove stem of course it’s completely stuck, lots of banging with hammer upwards came to nothing.
Have tried loosening the top of the threaded headset (I don’t know much about headsets), taking the bolt all the way out of the new stem, twisting the bars and wheel opposite directions etc. No effect.
Only other thing I can think of is the old stem had a wedge expander, this one has some hidden mechanism with a slot.
Anyone have suggestions or wants to tell me what I’ve done stupidly?