Gear Watch: How to Index Gears and Set Up Your Rear Derailleur By Global Mountain Bike Net December 25, 2016 A lot of riders struggle with indexing their gears and setting up their rear mech. Luckily Neil knows his stuff and is here to give you the fool proof way to get your gears running smoothly. Share This: Tweet Global Mountain Bike Net Not much is known about Global Mountain Bike Net, though the legend grows each day. Subscribe! Enter your email address to receive our top stories via email each week.