SRAM Red 22 Complete Flat Mount Caliper Assembly 18mm Front/Rear CheckoutSpec= DM CINCH They have a 4 mm

They have a 4 mm hex socket and are 10 mm long so you can use a bash ring with your chainring that has threaded standoffs like our 104 BCD 30t ring

For Installation

Topeaks Rail Wing system securely attaches the bag while also allowing for access when attached

Material: 20A durometer rubber on a rigid plastic liner

Also a great fit on the Specialized Stout crankset

SRAM Red 22 Complete Flat Mount Caliper Assembly 18mm Front/Rear CheckoutSpec= DM CINCH They have a 4 mmSRAM Red 22 Complete Flat Mount Caliper Assembly 18mm Front Rear. Red Disc Brake Caliper AssemblyCompatible with all SRAM road hydraulic brake levers Includes steel backed organic pads TECH SPECS Defined Color Silver Brake Caliper Type Flat Mount Brake Lever Actuation Hydraulic Rotor Included No Hydraulic Fluid Type DOT Pad Compound Organic keyword search 11. 5018. 047. 000 keyword search 115018047000