Our premium 1X RaceFace direct mount compatible Oval chainrings are designed for CINCH system RaceFace uses to mount chainring directly to the crank. If you have 4 arm RF crank, look at 104bcd Oval ring.Size (Weight):26T (52g)28T (54g)30T (58g)32T (62g)34T (69g)36T (72g)Compatibility:ÊRaceFace Cinch system cranks. RF Next SL, RF SIXC, RF Turbine, RF Atlas, AEFFECT CINCH cranks. 9, 10, 11 and 12spd Eagle compatible.Material:Êcnc machined 7075 Txxx Aluminum. Long-lasting constructionChainline: Perfect 49mm. 6mm offsetMounting: Direct MountOvality: Optimized to each size separately. Range: 10.2-14.4% and Timing of 110.5-116.3¡ after TDC (top dead center) Patent PendingAdvantages of our special Oval chainrings:Finest design to provide excellent weight to strength ratioOne of a kind special oval shape (Patent Pending)Unique Patent Pending narrow-wide teeth profiles to keep your chain in place for minimum 12 months!ÊSpecial 3D teeth machining for ultimate mud relief decrease wear and noise dramaticallyÊDesigned to handle mud and grass with easySuperb quality and great look.You will ride faster using ovals. If you keep using round ring then others will get quicker.ÊReduces stress on knees and helps to maintain your legs fresher for longer.You will not feel the oval shape at all.