Derailleur Arm – the arm which extends from your rear derailleur, with pulleys to feed the chain via. The derailleur arm is spring-loaded to eliminate slack with the chain when employing smaller sized gears. Shock absorber: for bicycles with suspensions, a device that may be part in the front fork https://bikeengineoilchangekm15823.blog-a-story.com/15947864/5-easy-facts-about-go-karting-near-me-indoor-described