SRAM X-Sync Road Direct Mount Chainring Rival - 40t 12-Speed 8-Bolt Direct Mount BLK MFPN=RB21EC90AX16D44 High quality lined cable housing

High quality lined cable housing

with extreme durability

Included neoprene sleeve insulates hand from cold during discharge

Lock it down

Model Twin Speed Drive Description Inflator Kit w/ Levers Head Presta/Schrader CO2 Included (2) 16g Color Black Weight 154g Description Type Inflator Kit W/ Levers Included Cartridge Count 2X16g

SRAM X-Sync Road Direct Mount Chainring Rival - 40t 12-Speed 8-Bolt Direct Mount BLK MFPN=RB21EC90AX16D44 High quality lined cable housingSRAM X Sync Road Direct Mount Chainrings for Rival drivetrains feature a wide tooth narrow tooth design to provides maximum chain control. SRAM X SYNC wide tooth narrow tooth chainring technology provides maximum chain control Laser etched chainring finish is more durable X Range gearing technology gives you more range and a smoother gear progression so you're always in the right gear Tooth Count 40 Drivetrain Speeds 12 Round or Oval Round Defined