This is the replacement derailleur hanger for the BMC Team Machine SLT 01 and early version of the Road Racer SL 01 (with round seatpost, not aero) framesets. It is not compatible with other models, such as the Pro Machine SLC 01 or Streetfire SSX.

The actual weight of the BMC SLT01 and SL01 Derailleur Hanger is 15g.