absoluteBLACK Narrow Wide Oval CX 110 5B Chainring Black

. Size (Mass +/-1g): 38T (63g), 40T (68.5g), 42T (76g) Bolts included to every chainring (mass given for chainring only) . Colour: Black: Ultegra Grey . Compatibility: Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+, S-works and many older cranks. Also fits Sram cranks with removable spider that have 1 hidden chainring bolt like Force22, Rival22. Compatible with Di2 . Material: cnc machined 7075 Txxx Aluminum. Long-lasting construction . Finish: type II anodizing . Ovality: 10.5-11.4% ; Timing of 112-113 after TDC (top dead centre) - Patent Pending ADVANTAGES OF OUR SPECIAL CX OVAL CHAINRINGS: . Finest design to provide excellent weight to strength ratio . One 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! . Special 3D teeth machining for ultimate mud relief decrease wear and noise dramatically . Designed to handle mud and grass with easy . Superb quality and great look. . You will ride faster using ovals. If you keep using round ring then others will get quicker. . Reduces stress on knees and helps to maintain your legs fresher for longer . You will not "feel" the oval shape at all