Shimano 105 FC-RS520 Crankset - 165mm 12-Speed 50/34t 110 Asymmetric BCD Hollowtech II Spindle Interface BLK CheckoutSpec= 05-09 X9 (M/L Cage) }KMC X12 Chain - 12-Speed

}KMC X12 Chain - 12-Speed 126 Links Silver Bulk Box of 25

It allows you to change the head tube angle by -1º to make for a slacker geometry for added stability on fast descents

Comes with 2 adaptor for Universal fit

}RockShox ZEB A1+ DebonAir+ Buttercup Air Spring Assembly Upgrade Kit - 180 mm

Shimano 105 FC-RS520 Crankset - 165mm 12-Speed 50/34t 110 Asymmetric BCD Hollowtech II Spindle Interface BLK CheckoutSpec= 05-09 X9 (M/L Cage) }KMC X12 Chain - 12-SpeedThe Shimano 105 FC RS520 is a 2 piece 4 arm crank that's compatible with modern disc brake road frames. 4 arm crankset for 12 speed drivetrain Compatible with frames of O. L. D. 135mm and 410mm chainstay length 44. 5mm chainline 150mm Q factor Compatible with HG 12 speed chains Color Black Rings 50 34 Number of Chainrings Double Crank Length (mm) 165 Crank Intended Use Road Drivetrain Speeds 12 BB Included No Pedal Spindle 9 16" Spindle Interface Type