Gusset: plates included to your outsides of frame tubes to strengthen joints. These are typically much more normally seen on off road bikes that need to be sturdier. Freehub: a ratcheting assembly onto which a cog or cassette is mounted that permits the bicycle to coast without the pedals turning https://juliusiloqr.verybigblog.com/34191739/5-simple-statements-about-engine-cycle-diagram-explained