The Bird Cage rim features an aero cross section with a hollow rim bead to reduce weight.

Specifications:
Wheel Size: 20"
ISO Diameter (ETRTO): 406
Effective Rim Diameter (ERD): 383mm
Spoke Count: 36H
Brake Type: Rim Brake
Rim Joint: Welded
Rim Dimensions: 34mm (Width), 21mm (Height)
Valve: Schrader
Tire Type: Clincher
Material: Aluminum
Color: Chrome
Weight: 408g