Integrated 1-1/8" and 1-1/2" threadless, Campy-style 1-1/8" upper with 1-1/2" lower, full cartridge bearings, w/ 1-1/8" adapter and extra lower bearing
Additional parts
Seatpost
Seatpost reducer shim, 1x30.9/27.2, 1x30.9/25.4
Seatpost Clamp
34.9mm, forged alloy, single-bolt clamp
Other
Collar, single and multispeed hardware, owner's manual