32 holes, 6-hole disc brake mount, for 12 mm thru-axle, installation width 148 mm (Boost), suitable for e-bikes, black High aluminum hub body for more rigidity, smooth running due to sealed industrial bearings (Revo Bearing), light aluminum freehub body, with CONTEC pawl / ratchet freehub system for special longevity, even with high torque from large cassettes, 42-tooth ratchet freehub system, 6 pawl arrangement for fast response Axle Thru-axle 12 mm Installation Rear wheel Number of pawls 6 pcs. Item type Cassette Brake mount Hub Disc - 6-hole Braking surface yes, no E-bike type ready Installation width 148 mm (Boost) Flange diameter 64.5 mm Freehub body HG-M, MTB Freehub system 42 teeth For wheel Premium Gears 8-speed, 9-speed, 10-speed, 11-speed Main color black Chainline 47.5 mm Bearing type Industrial bearing Material freehub body Aluminum Material hub body Aluminum Hub model M.Core DB Spoke hole count 32 holes Spoke hole diameter for 2.00 and 2.34 mm Spoke type J-Bend Text Wheel configuration suitable for e-bike