Full Speed Ahead MTB Pro Double Chainring - 38t 104 BCD 4-Bolt Aluminum D10 BLK MFPN=CK23ERA136ARM175BLK }SRAM Derailleur Pulleys for 2003-07

}SRAM Derailleur Pulleys for 2003-07 X0 short cage X9 and X7

Chorus 12-Speed Shift LeverUltra-Shift mechanism controls the 12-speed rear derailleur letting the rider shift up by up to 3 sprockets and down by up to 5 sprockets in a single movement

Aerodynamics Flowstraps

} Air Flow Contact System offers perfect back ventilation Separate and quick-access tool compartment Material: N 210D Ripstop HD

Full Speed Ahead MTB Pro Double Chainring - 38t 104 BCD 4-Bolt Aluminum D10 BLK MFPN=CK23ERA136ARM175BLK }SRAM Derailleur Pulleys for 2003-07FSA's MTB Pro chainrings deliver flawless shifting for mountain drivetrains. Precision CNC machined AL7075 T6 alloy Shifting ramps and stainless pins for improved performance Ring Position Type Outer Tooth Count 38 Drivetrain Speeds 10 Chainring BCD 104 Color Black Defined Color Black