SONA conical type bicycle hub, model SC-HB-104, made in front and rear versions for bicycle wheels. The front hub is sized 3/8" X 5 1/2" and the rear 3/8" X 6 1/2" or 7", with spoke holes to order. The hub is the centre of the wheel: it turns on its axle, and the spokes lace into its two drilled flanges. This conical type has a bright silver finish, a SONA-marked shell, and cones and locknuts on each threaded axle end.