Industry Nine Enduro S Hydra Wheel Rear 29 / 622 Holes: 28 12mm TA 157mm Disc IS 6-bolt Shimano Micro SplineBuilt for aggressive trail, enduro, and all mountain use Hydra hubs with 690 points of engagement (0. 52 degrees) 28 straight pull steel spokes TECH SPECS Freehub Body Shimano Micro Spline Rim Construction Double wall Position Rear Rim External Width 34. 1mm Rim inner width range 28 34. 9mm Rim Material Aluminum Wheel Tire Type Tubeless Ready Rim Model Enduro S Spoke Type Straight Pull Stainless Rim Internal Width 30. 5mm Wheel Diameter ISO 29 622