absoluteBLACK | Round 104 / 64BCD 1X chainrings。absoluteBLACK | Round 104 / 64BCD 1X chainrings。Amazon | ABSOLUTE BLACK (アブソリュートブラック) PREMIUM ROAD OVAL。新品未使用品 absolute Black のナローワイド(×1)チェーンリングです。Premium XT8000 1X Chainrings。36TCompatible with all cranks with 4×104This chainring is intended for 1×10/11 application only.(If running on 1×9, then 10spd chain must be used).Chainring tooths are optimized to prevent chain-drop while riding in rough terrain. No front chain-guide is required. If used with triple crankset - mount in middle position. Tighten all 4 bolts to about 5-7Nm.