Continental 42mm Wide Presta Valve Bike Tube, Black, 700 x 25-32cc (Race 28)

With its "horizontal parallelogram" design and pulley offset, X-HORIZON keeps the chain gap constant across all 11 gears, providing fast, precise shifts. By limiting all movement to the horizontal axis, this design is faster, reduces shift force and eliminates ghost shifting.

Roller bearing clutch eliminates derailleur bounce and chain slap
X-Horizon design maintains constant chain gap across all gears and eliminates ghost shifting
Roller bearing clutch eliminates derailleur bounce and chain slap
Cage Lock feature simplifies wheel removal and chain installation
Must be used with SRAM 1x11 shifter and cassette
Roller bearing clutch eliminates derailleur bounce and chain slap
X-Horizon design maintains constant chain gap across all gears and eliminates ghost shifting
Roller bearing clutch eliminates derailleur bounce and chain slap
Cage Lock feature simplifies wheel removal and chain installation
Must be used with SRAM 1x11 shifter and cassette

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SRAM XX1 Rear Derailleur - 11 Speed, Medium Cage, Black/Red;