Item DescriptionKits include a pair of adapters only (bolt, axle, and quick release available separately)IS: 6-bolt / 44mm BCD International StandardQ/R: quick-release, T-B: thru-bolt, T-A: thru-axleInstructions and hub axle determinations are available online @ www.notubes.comItem Specificationsconverts to: 10x135mm T-Bstock configuration: 10x135mm Q/Rhub/wheel model: rear (IS): 3.30 / Crest/Arch disc: