Easton bottom brackets have been developed for use in combination with Easton EC90 SL cranksets. Bottom brackets are an essential part of the bicycle that is often overlooked, but Easton saw it as an opportunity for performance gains and improved efficiency.Bearing seals have a very low level of drag while retaining excellent protection qualities and keep contaminants outLow viscosity grease and optimized fill percentage hits the perfect balance between durability and minimal friction