Originally Posted by
Slogger
To replace the stem, I see on pictures that have been sent suggest the bike is a 86 or 89 frame and the stem is a SR Custom Alloy 100 mm. So I can go online and order a 130 mm 22.4 mm or 25.4 mm (opening?) quill, threaded stem? Does that fit this, does anyone think might be correct? I still do not understand how to determine the opening, is it 1" or 1 1/8"?
Please review this
Park Tool - Headset standards
quill, threaded stem? Yes, you have a threaded steerer-tube with threaded headset that accepts a quill stem
is it 1" or 1 1/8" The outside-diameter of the fork steerer-tube is 1"
130 mm 22.4 mm or 25.4 mm Your existing stem is 100mm extension, do you want a 30mm longer reach to the bars? The diameter of the quill that goes inside the steerer-tube is most likely 22.2mm. The handlebar-diameter that fits into the stem's handlebar-clamp is most likely 25.4mm.
I still do not understand how to determine the opening You want to get a set of calipers. Very helpful for working on bikes and determining the dimensions of various parts:
