Brake type: Disc Brake
Axle Type: QR 15 /12 / 5.2mm (one hub can be
compatible with 3 different end cap)
Flange Diameter: 66mm
Spoke P.C.D: 58mm
Spoke Holes: 28H / 32H / 36H
O.L.D: 100mm; 110mm for Boost (JH-KD1F)
Sealed Cartridge Bearing (SB): 2pcs
Boost 4 in 1