SRAM X5 Rear Derailleur - 9 Speed Medium Cage Silver Model=Saddle Covers Ultimate in stiffness and durability

Ultimate in stiffness and durability while only weighing a mere 400 grams - in the same weight range as premium carbon cranks but 20% to 30% stiffer

Rear Axle 14mm Threaded x 110mm Cassette Body Type Single Cog Driver Wheel Size 20" Defined Color Black ISO Diameter 406 / 20" BMX Tire Type Clincher Hub/Brake Compatibility Rim Brake Valve Schrader

Bearing Type Cartridge Bearing Type Black Oxide Steel Color Black S

}DT Swiss Standard Spoke Nipples - Brass 2

7 Bolt Mount Diameter 8

SRAM X5 Rear Derailleur - 9 Speed Medium Cage Silver Model=Saddle Covers Ultimate in stiffness and durabilitySRAM X5 Rear Derailleur 9 Speed Medium Cage Silver. Affordable and reliable derailleur is great for repairs and upgrades. TECH SPECS Rear Derailleur Mount Type 10x1 Standard Rear Der Shifter Compatibility SRAM 1: 1 Cage Length Medium Drivetrain Speeds 9 Weight 290 Color Silver Chain Wrap Capacity (teeth) 37 Largest Cog 34