Syncros SCT Boost MTB Hub Set - 28 Hole - SRAM XD Driver - 6 Bolt Disc - BlueSyncros SCT Boost MTB Hub Set 28 Hole SRAM XD Driver 6 Bolt Disc Blue This incredibly versatile and easily serviceable hub set from Syncros a bullet proof high quality set engineered for a quality smooth ride time and time again. The rear hub uses a 4 pawl ratchet system offers points of engagement and is set up with 12 x 148mm spacing, the front hub utilises as 15mm bolt thru axle with 110mm spacing. Available in a striking anodised blue this hub set