Not compatible with Hydra 2 hubs. Only compatible with original 2019-2024 Industry Nine Hydra hubs. Replacement and conversion freehub bodies Complete freehub body kits with necessary parts to replace or convert your hub. Compatible with 2019-2024 Industry Nine Hydra rear hubs Includes: (1) Hydra freehub XD or HG body shell, (1) bearing spacer, (1) 152610 bearing, (1) 15267A5 bearing, (6) Hydra pawls, (6) Hydra springs and (1) freehub body seal HG+ Includes: (1) Hydra HG+ Micro Spline freehub body shell, (1) bearing spacer, (1) 152610A3 bearing, (1) 6802A3 bearing, (6) Hydra pawls, (6) Hydra springs, (1) freehub body seal and (1) MS 12mm drive side endcap. Compatible with 12x142/148/157/177/197 Hydra hubs