The Mac 120 or 140 Rotor Disc Brake mount is a precision manufactured BMX specific part. CNC machined from 6061-T6 alloy and made in New Zealand. Mount will suit Onyx Ultra Series and Ultra SS Series Hubs with 10mm dropouts and is compatible with 120mm or 140mm rotors. Black annodised finish.
 
We recommend this product be installed by a Professional Bike Mechanic, with correct hardware.