These hubs are 28 hole small flange, flip/flop, sealed cartridge bearing aluminum hubs. These will work with single speed thread-on freewheels that are 13t and larger. The one side is threaded 30mm x 1 and the other side is threaded 1.37 x 24. They have an aluminum shell and are black in color. The OLD is 100mm front and 110mm rear and the axles are 3/8".
Color: Black
