TWIFLEX Disc Brake Caliper GMX series

 The GMX series disc brake calipers are similar to the MX series, but the brake pad area is larger. The GMX25, GMX30 and GMX40 are suitable for 25.4mm, 30mm and 40mm thick discs respectively. SGMX calipers are only suitable for 25.4mm think disks. The small disc is 610 mm in diameter.