Redesigned with scalloped hub flange to distribute stress loads- Thicker axle and larger bearings throughout- E-bike compatible- Hydra2 freehub mechanism improves over previous Hydra hub internals with larger pawl pockets and tougher metal for the drive ring- 6-pawl, 6-phase, with an extra tooth on the pawl for quicker .41 deg between engagement points- 6-bolt/44mm-BCD International Standard disc mounting dimensions- There can be color variations during anodization from batch to batch from the colors you see on our site- Made in Asheville, NC USA