RaceFace Narrow Wide Chainring: Direct Mount CINCH 36t GreenRaceFace Narrow Wide Chainring: Direct Mount CINCH 36t Green. Narrow wide chainrings compatible with Race Face CINCH system cranks. Direct mounting allows an easy switch between rings and spiders. Compatible with 9 10 11 and 12 speed (excluding Shimano 12 speed chains) Narrow Wide tooth profiling ensures consistent chain retention Lockring installed removed with ISIS BB tool Stiff 4mm plate thickness to transfer loads without flexing TECH SPECS Ring