Convert your Crankbrothers 110x15mm Boost six-bolt front hub to Rockshox 15mm Torque Cap compatibility for use with select Rockshox forks. Torque Caps for CB Pawl Hub Set Compatible with: Synthesis Enduro Alloy - CB Pawl front hub (matte finish) Synthesis Enduro Carbon - CB Pawl front hub (matte finish) Synthesis XCT Alloy - CB Pawl front hub (matte finish) Synthesis XCT Carbon - CB Pawl front hub (matte finish) Synthesis E-MTB Alloy - CB Pawl front hub (matte finish) Synthesis E-MTB Carbon - CB Pawl front hub (matte finish) Torque Caps for CB Ratchet Hub Set Compatible with: Synthesis Enduro Carbon - CB Ratchet front hub (glossy finish) Synthesis XCT Carbon - CB Ratchet front hub (glossy finish) Synthesis E-MTB Carbon - CB Ratchet front hub (glossy finish) Not compatible with Industry Nine Hydra, 1/1, or any other brand/model of hub. Only compatible with Crankbrothers pawl-based or ratchet-based front hubs with six-bolt rotor flanges (not centerlock compatible).