Drive compatibility: SRAM XX1, X01, GX Eagle, 12-speed chains. - Compatibility freewheel: XD, XDR with 1.85mm spacer. - Color: lower sprocket(Rainbow) / upper sprocket (Black), as pic. - The seven small sprockets SACM645 material: steel surface-treated (9/10/12/15/18/22/26T).
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