Sram X4 Rear Derailleur Kids Bike Helmets Includes all four sizes of

Includes all four sizes of the Tricam Evo that feature three (instead of the historic two) placement possibilities making it even more versatile than the traditional Tricam

that you get proper ventilation on all of your engine compartments

Perfect as a lightweight backup or travel bag

thanks to the backlit display and button-operated design

The Campagnolo Chorus cassette offers cyclists even more versatility and greater choice and autonomy in terms of available gears

Sram X4 Rear Derailleur Kids Bike Helmets Includes all four sizes ofSRAM X4 Rear Derailleur 7 8 9 Speed ESP compatible (1: 1 actuation ratio) for ESP trigger or twist shifters Di. R. T (Direct Route Technology) for light effort shifting performance Alloy outer link and B knuckle with Grilon composite P knuckle Steel composite cage with replaceable pulleys 7 8 9 speed compatible with top normal resting position