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- Arm Material: Forged Alloy
- Ring mount size: 104/64mm
- Compatible only with PowerSpline bottom brackets
This fits your .
S600/650: Labeling and Finish mesh perfectly with SRAM drivetrain families. Forged arms increases the strength and reliability paired with smooth shifting 8/9-speed chainrings—give you the best combination of looks, performance and price. SRAM’s proven Power Spline and classic square BB interfaces are available. Intended to compliment our X.4 and X.5 Families.SRAM: Tweak. Refine. Tweak. Refine. Leap Ahead.