Derailleur Arm – the arm which extends through the rear derailleur, with pulleys to feed the chain by. The derailleur arm is spring-loaded to eliminate slack from the chain when employing smaller sized gears. Controls: Like flat bars, riser bars typically have brake levers and kit shifters, and extra space https://bike-engine-2-stroke68911.losblogos.com/34094657/an-unbiased-view-of-bike-engine-parts