Our premium 1X Cannondale Hollowgram direct mount Oval chainrings are designed for Hollowgram crank family. Compatible with old and newest models.CNC machined 7075 Txxx Aluminum. Long-lasting construction.Great traction at the fraction of the price ! Narrow Wide tooth profile.Compatibility……Cannondale Hollowgram Si, SiSL, SiSL2 and newest F-Si
