700c aluminum rim 16-21 holesSuper nice 700c aluminum rim 16 21 holes 32mm high rim, rim brake Floating spokes, 2 layers, made in Taiwan Quality guaranteed, cheap price, beautiful product

6-screw disc hub

Used on bikes where the derailleur is held in place by the wheel nuts

Weight: 270gram

Ceramic bearing version save over 2

Specialized，Cannondale，Santa Cruz， Bianchi，Pinarello，Giant，Trek

It can be a flexible hose (usually made of rubber or synthetic material) or a rigid hose (usually made of metal)

The fixed slot of the straight carriage is fastened with screws and will not slide

Material：aluminum

or Vintage/Classic bicycles using rim brakes (V-brakes / caliper brakes)

Spoke hole:  28H

thickness 7mm

This is the fastest RD pulley system