absoluteBLACK Premium 1X Gravel 110/5 bcd oval chainrings are designed for all Shimano 5 bolt cranks like Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750 and many others. Perfect choice for Gravel & Road 1X setup. Eagle 12spd compatible, narrow-wide chainring. Delivered with mounting bolts for your convenience. Chainring has 1.5mm offset towards frame for perfect chainline. Super stiff construction despite many cutouts. Size (Mass +/-1g): - 44T (82g) - 46T (87g) - 48T (94g) - 50T (104g) 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 that have 1 hidden chainring bolt like Force22, Rival22 but they need to have removable spider. 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 center) - Patent Pending ADVANTAGES OF OUR SPECIAL GRAVEL 1X 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 ease *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 HOW TO MOUNT GRAVEL 1X 110/5 OVAL CHAINRING: First you need to remove crank from the bike. Once removed, unscrew 5 bolts that hold two original rings together with T-30 torx key. Take off both original rings. Position Absoluteblack oval chainring in place where the big chainring was. Please note that small indicator on the chainring Must sit behind crank arm - same way as original chainring indicates its position (In case of Sram cranks with hidden bolt the indicator has to be positioned exactly opposite to the crank arm). Use provided AB bolts to lock the chainring in place using T-30 torx key with force of about 5-7Nm. Mount your crank back to the bike. Done Always use a new chain with a new chainring. Designed in UK. Manufactured in Poland (EU).