Originally Posted by
une_vitesse
most stems come with quills in two sizes: 22.2 and 22.0 mm. The latter is specific to french bikes, and the first covers all other 1" threaded fork steer tubes.
Don't forget the 21.15mm size.
But, that Nishiki should have a 22.2mm stem, otherwise known as a 1" stem. Not to be confused with the 25.4mm (1") diameter stem that fits into a 1 1/8" steerer. The bar clamp size should be 25.4mm, the 60mm is the extension.
There is a lot to consider when buying a quill stem, you need to make sure the three sizes are correct, plus the height.