SDG I-Beam Alloy Micro Seatpost 31.6 x 400mm MFPN=05023461001 Aluminum construction is lightweight and

Aluminum construction is lightweight and durable

Compatible with all MTX QuickTrack racks with attached side frames

42 BB/Frame Interface BB30 BB Shell Width (mm) 68 BB Shell Width (mm) 73 Weight 127 Spindle Interface Type Shimano Hollowtech II Spindle Interface Type FSA MegaExo Spindle Interface Type FSA MegaExo Light Spindle Interface Type RaceFace EXI Defined Color Black

For example

SDG I-Beam Alloy Micro Seatpost 31.6 x 400mm MFPN=05023461001 Aluminum construction is lightweight andAlloy mast with micro clamp aluminum head One bolt adjusts tilt and fore aft saddle position (no offset clamp) I Beam single rail clamp post specific to I Beam saddles TECH SPECS model Micro I Beam diameter 31. 6mm length 400mm setback zero material aluminum color black