Derailleur Arm – the arm which extends from your rear derailleur, with pulleys to feed the chain by way of. The derailleur arm is spring-loaded to get rid of slack within the chain when using smaller gears. Getting to grips with all the various bike parts’ names normally takes a https://bikeengine2stroke37269.blog5.net/79708934/the-5-second-trick-for-engine-bike-kit