absoluteBLACK Oval Direct Mount Chainring - 34t CINCH Direct Mount 3mm Offset Requires Hyperglide+ Chain BLKabsoluteBLACK Oval Direct Mount Chainring 34t CINCH Direct Mount 3mm Offset Requires Hyperglide+ Chain Black. This absoluteBLACK 1x Oval Direct Mount Chainring for CINCH is designed exclusively for use with Shimano Hyperglide+ chains (CN CN M9100 8100 and 7100). They are crafted from CNC machined 7075 aluminum for exceptional durability. Ovality has been optimized for each chainring size ranging from 10. 2 14. 4%. This chainring will only work with