Brake Pads – made from the strong materials, they’re pressed towards the rim to generate friction to sluggish the bike down. Hanger: part of frame or an attachment towards the frame to which the derailleur is hooked up (see Derailleur hanger) Handlebars can be found in a variety of sorts. https://bikeenginenumber05920.blog-a-story.com/15943773/engine-bike-50cc-secrets