The Original absoluteBLACK Premium direct mount 1X Oval chainrings are specifically designed for Sram T-Type transmission drivetrain cranks. Fits cranks with 8-bolt mounting pattern. Chainring teeth have been specifically redesigned to work in all conditions with narrower chains that inherently have less space to accommodate mud. It is the most Premium oval chainring on the market with scientifically proven performance gains. Chainring offset is 3mm (same as stock part).