absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACK's top-tier design features to greatly improve traction and speed. They are for use with all pre-2014 Shimano 5-bolt cranks, such as Dura-Ace FC7950, Ultegra FC6750, Shimano 105 5750 and more. Optimized with smooth shifting in mind, premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum, and feature an anodized finish for exceptional durability.Outer rings feature 6-point shifting ramps that work in conjunction with the tooth recesses to stabilize the chain while shifting, and allow for easy and quick gear changesOuter chainrings also features 12 down-shifting point10.3% ovality is ideal for road climbing135gOval shape reduces stress on knees, helps to keep your legs fresh, and does not feel any different while ridingChainring design reduces the possibility of leg cramps, and allows you to maintain a better cadence while climbingUse with absoluteBLACK long chainring boltsItem SpecificationsChainring BCD110ColorBlackDefined ColorBlackDrivetrain Speeds10Drivetrain Speeds11MaterialAluminumRing Position/TypeOuterTooth Count52