Because we live to create finest design, use best materials possible, high-tech cnc machines and spend countless hours in refining the quality of each product. AbsoluteBlack encourages modern mountain bikers to ride anywhere with its advanced Oval chainring concept that improves rider efficiency. Designed with both XC and aggressive trail riders in mind. All chainrings are compatible with 10 and 11 speed drivetrains. Perfect for Singlespeed use as well. We are the largest oval ring manufacturer Worldwide with greatest expertise in mtb field.