Just received my new tubes and tires for my 15. I had the rim washers and valve stem covers already. The rim washer (hex shaped) are nickle plated and don't fit on the brass threads of the new tubes. They look like they should work but I can't get the threads to start. Is it possible that the early brass rim washers were a different thread than the newer nickle ones? Anyone had this problem?
You got bit! The new valve stems that are vulcanized to the tubes are 100% wrong. To use the parts you have, you will have to get original parts, which are easy to find. Look for Schrader 777 or 888 stems.