100MM X 15MM DISC HUB TO 110MM X 15MM BOOST KIT. THIS KIT ALLOWS A 100MM X 15MM HUB TO BE FITTED TO A BOOST TYPE FORK WITH A 110MM X 15MM AXLE SIZE. 6 BOLT DISC MOUNT. 1 X FRONT KIT ONLY. KIT INCLUDES; 1 DISC SPACER, 2 X AXLE SPACERS AND 6 X EXTRA LONG DISC BOLTS.