absoluteBLACK Premium 1X Gravel 110/4 bcd oval chainrings are designed for all Shimano 4 bolt cranks like Dura-Ace 9100, 9000, Ultegra 8000, 6800 and many others. Perfect choice for Gravel & Road 1X setup. Eagle 12spd compatible, narrow-wide chainring. Delivered with mounting bolts for your convenience. Chainring has 1.5mm offset towards frame for perfect chainline. Super stiff construction despite many cutouts.Size (Weight):46T (86g)48T (90g)50T (100g)Compatibility: Shimano Dura-Ace 9100, R9120, R9150 & R9170 Di2, Ultegra 8000, R8020, R8050 & 8070 Di2., 105 R7000, R7020, R7070, Dura-Ace 9000, Ultegra 6800, Shimano 105 5800, Tiagra 4700 ; 10 / 11 / 12spd compatible. In short ALL Shimano 4 bolt cranksMaterial: cnc machined 7075 Txxx Aluminum. Long-lasting constructionMounting: 110 BCD x 4