The Absolute Black Oval Winter 110 BCD Chainring is designed for new type of Shimano cranks like Dura-Ace 9000, Ultegra 6800, 105- 5800 and others. This is a simplified version of our Premium line. Same aluminium, teeth and shifting ramps, but less material machined out on the outer side for easy maintenance and cleaning on winter training bikes. Weight is increased on these chainrings as compared to our Premium line for that reason. Winter line chainrings are a simplified version of our state-of-the-art Premium line. They use same aluminium, teeth and shifting ramp design. However they are less machined out from the front for easy maintenance and cleaning when used on winter bikes. This chainring is designed for your winter/training bike where weight is not an issue, but easiness of cleaning is. Absolute Black Oval Winter 110 BCD Chainring Features One of a kind special oval shape that helps you climb easier and faster (Patent Pending) Over 15% stiffer than Rotor Qrings due to thicker, 5mm construction Bespoke AbsoluteBlack 6 point ramp and recess shifting design shifts better than any other brand and model of oval chainring 30% heavier than our Premium chainirngs, but very easy to clean after winter training. You will not feel the oval shape while pedaling Your pedaling action will feel smoother Helps reduce stress on knees and helping your legs remain fresher for longer You will be able to maintain better cadence while climbing Reduces possibility of leg cramps You will reduce chainring/cog shifts by at least 15%