GSport Birdcage Rim (Black) Color:Hard Anodized Black Aluminum Linear Housing prevents binding

Aluminum Linear Housing prevents binding during barspins

Axle Slots: 3/8"

Seat Post: Micro adjust

Butted Seat Tube & Miter Cut Top Tube:

Directional spoke hole drilling

GSport Birdcage Rim (Black) Color:Hard Anodized Black Aluminum Linear Housing prevents bindingLightweight Structure At first glance the Birdcage looks like a fairly conventional aero style rim, but there is more to it than that. The first clue comes from the name; birds have hollow bones to save weight whilst retaining as much strength as possible, and the Birdcage rim has a hollow bead for the same reason. The rims hollow bead is still big and chunky to help reduce the chances of pinch puncturing or flat spotting the rim, but by creating a