Industry Nine Hydra 2 Enduro Carbon Wheelset - 29", 15 x 110mm/12 x 148mm, 6-Bolt, Micro Spline, Black, 32HThe Hydra 2 Enduro Carbon is Industry Nine's most advanced enduro race wheelset ever. Front and rear specific carbon layups offer both a comfortable ride and the durability enduro racing demands, while keeping weight low to conserve energy on those long days in the saddle. Hydra 2's immediate engagement hub lets you get on the gas quickly when the trail transitions, saving precious seconds that could put you on the podium. 6 Pawl Hydra 2 Freehub Body