I just opened a box of Dura Ace brake/gear levers and inside there is a small tublar thingy with a red blob inside the clear section and markings on the tube showing H and L - it looks like some type of in-line gear indicator. Anybody know what it is and what to do with it? I can't see any reference to it in the Shimano instruction sheet (maybe I am going blind?).
Thanks.
Thanks.