SRAM XX1 Rear Derailleur - 11 Speed Medium Cage Black CheckoutSpec= Navy Blue Aero optimized fixie wheelset with

Aero optimized fixie wheelset with 62mm tall carbon rims laced to 240 Dicut hubs with flat forged Aerolite T-head spokes

Diameter 27in Front/Rear or Set Rear ID Width (mm) 19 Axle Size B/O 3/8 Rim Color Sil NMSW Rim Model Alloy Hub Model Shi E110 Hub Spacing 110 Hub Color CP Gears 1s Brake Type CB Spoke Type 14G UCP Spoke Count 36H Wall Sgl Valve Type SV

Designed to work with an XDR driver body Range 10-28 Cogs 10-11-12-13-14-15-16-17-19-21-24-28 Cassette Body Type SRAM XDR Drivetrain Speeds 12 Color Silver/Black Defined Color Black

The smooth Corsa inspired center rolls fast while the side tread "scales" provide durable bite when cornering and braking

Easy to attach to any bike including E-bikes

SRAM XX1 Rear Derailleur - 11 Speed Medium Cage Black CheckoutSpec= Navy Blue Aero optimized fixie wheelset withProfessional grade derailleur built with carbon fiber and aluminum featuring roller clutch pulley cage and cage lock feature for easy wheel installation. Wide tooth narrow tooth pulley wheel maximizes chain control by fitting inner and outer chain links perfectly 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