These came off my 11 y/o daughters 2021 Norco Fluid mountain bike. They have a Shimano HG style splined freehub. 29mm inner width. They've been used for about 5 or 6 rides. In excellent like new condition. Tubeless compatible. FRONT HUB Alloy 15x110mm Boost, 6 Bolt REAR HUB Alloy 12x148mm, HG, 6 Bolt RIMS Stan's Flow D 32H SPOKES/NIPPLES Stainless, Black