32 hole, Center Lock disc brake mount, for 12 mm thru-axle, installation width 148 mm (Boost), suitable for e-bikes, black High aluminum hub body for increased stiffness, smooth running due to sealed cartridge bearings (Revo Bearing), lightweight aluminum freehub body, with CONTEC pawl / ratchet freehub system for special durability, even with high torque from large cassettes, 42-tooth ratchet freehub system, 6 pawl arrangement for fast response Axle 12 mm thru-axle Mount Rear wheel Number of pawls 6 pcs. Item type Cassette hub Brake mount Disc - Center Lock 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 Chain line 47.5 mm Bearing type Cartridge bearing Freehub body material Aluminum Hub body material Aluminum Hub model M.Core CL Number of spoke holes 32 hole Spoke hole diameter for 2.00 and 2.34 mm Spoke type J-Bend Text Wheel configuration suitable for e-bike