The designs of, the roller is broader and is using material as soft as possible, since DA BOMB was considering to upgrade GS-D on the achievement of reducing and avoiding from unnecessary frictions, resistance and noise.
Lightweight design
For dual chain wheel
Avoid from unnecessary vibration and chain offset
Chain ring capacity: 22T-38T
Chain guide system: I.S.C.G 05
Color: Black
Weight: 77g
