Gusset: plates added for the outsides of frame tubes to strengthen joints. These are generally much more typically found on off highway bikes that need to be sturdier. Freehub: a ratcheting assembly onto which a cog or cassette is mounted that enables the bicycle to coast without the pedals turning https://damiendujvj.blog5star.com/35582982/new-step-by-step-map-for-bike-engine-kit