These are 36-hole flip/flop, sealed cartridge bearing aluminum hubs that have a high flange with a cutout design. The hubs have an aluminum shell. These will work with single speed thread-on freewheels that are 13t and larger. One side is threaded for 1.37x24t thread freewheels (16t and larger), and the other side is threaded 30mmx1 (13t-15t).
Drilling: 36H
Axles: 3/8"
Front OLD: 100mm
Rear OLD: 110mm
Color: Gold Anodized
