Wolf Tooth Elliptical 96 BCD Chainring - 30t 96 Asymmetric BCD 4-Bolt Drop-Stop For Shimano XT M8000 SLX M7000 Cranks BLKWolf Tooth Elliptical 96 BCD Chainring 30t 96 Asymmetric BCD 4 Bolt Drop Stop For Shimano XT M8000 and SLX M7000 Cranks Black. Designed to fit 4 arm 96 Asymmetric BCD XT M8000 Cranks. Its proprietary design has an ovality of 10% and a timing of 112 degrees after top dead center which provide the beneifits of an oval ring such as greater rear wheel traction without the traditional downsides of oval rings. This chainring features the patent pending