Shimano, XTR BR-M9220, MTB Hydraulic Disc Brake, Front or Rear, Post mount, Disc: Not included, 294g, Black

SRAM, Apex D1, Road Hydraulic Disc Brake, Front, Flat mount, Black

Shimano, Dura Ace Di2 ST-R9270 / BR-R9270, Road Hydraulic Disc Brake, Front, Flat mount, 140 or 160mm (not included), 175g, Black, IR9270DLF6SC100F

Shimano, Dura Ace BR-R9270, Road Hydraulic Disc Brake, Front, Flat mount, Black, IBRR9270F6RF

Avid, BB5 MTB, Mechanical disc brake, Grey, Front or rear, No rotor, No adapter

Shimano, GRX ST-RX810-L / BR-RX810-F, Road Hydraulic Disc Brake, Front, 2 speed, Flat mount, 140 or 160mm (not included), Black, Set