bagpussctc wrote:Sounds like the alloy stem and the steel forks have bonded together . This is due to a lack of copper or silver slip or even plain grease to stop the chemical recation between the two different metals .
The only way to break the bond is heat or cutting the stem out.
Geez, no wonder you guys drive on the wrong side of the road.....
Extraction Is usually accomplished by using a penetrating oil around the base of the stem. letting it sit around for an hour or so and using a wooden mallet sticking it in such a manner as to turn it. Once the operation is started it still may not be easy but it will come free. Use a fine grit emery cloth to clean the inside of the steering tube out
A modern fix is to buy a threaded-threadless converter and then you have a very large choice of off-road or road stems at reasonable prices.