[gold]
[red]
[blue]
[black]
Color: black, gold, red, blue. Specifications: 28.6 (with front fork pipe) * 44 (with the bike frame head tube, hidden). Description: up and down are bearing structure, compatible with the up outer diameter of 28.6mm front fork and 44mm caliber built-in (such as ATX, XTC series) of the bike frame head tube.