I have a 89-90 vintage GT Timberline MTB and on the rear non-driveside axle, there is some kind of a seal or dust cap.
It is a Shimano, the hub says FH-HG20. The seal says Shimano Japan and VIA.
What I want to know is:
1. What is it? I guess the question would be is it an actual seal or just a dust cap?The ones on the front hub appear to be the same as the one I have off, I can't really see the one behind the freehub.
2. Is it supposed to be all metal or is it supposed to actually have a neoprene lip or some othe postive seal surface.
3. Where can I get a new one at and is the one on the drive side the same?