I am looking to upgrade my old 1970's Raleigh road bike quill stem. The stems I am looking at measure 22.2x180x60x25.4 and 22.2x180x80x25.4. I know I need a 25.4 inch stem but what do the other measurements mean and do they matter as much as 25.4 How can I tell my other measurements on my current road bike. Thanks.