Blackspire Super Pro Series Chainrings. The Engineered Ring! Modified shift gates and special profiles to allow 8/9 speed chains to shift flawlessly. Middle and outer chainrings have strategically placed stainless steel pins to further enhance shifting. The Middle rings of the Blackspire Super Pro Series Chainrings are cut from thick .190 material and the outer rings are cut from .160 material. For 8/9Speed drivetrains. Anodized black w/ Laser etched Graphics.
SPECIFICATIONS:
Material: 7075 T6 Aluminum
Color: Black
Bolt Pattern: 4-Arm 64/104 BCD
Note: Semi new, Installed but never used (Great Shape)
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