6061-T6 alloy replacement rings. 8 9 and 10-speed compatible. Black anodized with silver CNC machined teeth. Made in U.S.A. TECH SPECS Mount Compatibility 130mm 5-bolt Teeth 39T Type Non Ramped Material Spec Color Black/Silver Chain Compatiblity 8/9/10sp T
6061-T6 alloy replacement rings. 8 9 and 10-speed compatible. Black anodized with silver CNC machined teeth. Made in U.S.A.
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