absoluteBLACK Round Narrow-Wide Direct Mount Chainring - 28t CINCH Direct Mount 3mm Offset BLKabsoluteBLACK Round Narrow Wide Direct Mount Chainring 28t CINCH Direct Mount 3mm Offset Black. absoluteBLACK Round Direct Mount 1x Chainrings for CINCH allow for flawless boost setup. They are designed for RaceFace cranks that utilize the CINCH system. Direct mount chainrings provide significant weight savings over a standard spider and chainring combination. They are crafted from CNC machined 7075 aluminum and feature an anodized finish for