I was assembling my new Lux World Cup cf6 and this little piece came out of either my rear through axel, or a part of the cassette. (Cassette came off to take the dork disk off) in the process of removing the rear wheel, this little bit came off. Anyone know what it is and/or if I need it? I like to think I know a lot about bike mechanic stuff but I have no idea what this thing is.
by AugustTheGreat_