The Wolf Tooth Elliptical 110 BCD Asymmetric 4-Bolt Chainring for Shimano Cranks is a beautifully machined and lightweight chainring designed for 1x setups. With its patented wide-narrow tooth profile, this chainring ensures that dropped chains are a thing of the past. Say goodbye to chain mishaps and enjoy your ride to the fullest.Designed and tested in Minneapolis, this chainring is perfect for cyclocross, gravel, and road bikes. It is built to withstand extreme conditions and keep your chain secure. The innovative Drop-Stop® wide-narrow tooth profile not only provides excellent chain retention but also prevents the buildup of mud, dirt, and excess moisture. For added security in challenging terrain, pair this chainring with a clutch-type rear derailleur.Wolf Tooth is renowned for its top-notch design, reliability, and durability. Each chainring is machined in-house at their headquarters in Minnesota, USA, and features an anodized finish and machined lettering that showcase their craftsmanship.The PowerTrac Elliptical (PTE) design by Wolf Tooth is focused on power and traction. By utilizing an elliptical shape, this chainring maximizes power output throughout each pedal stroke. It provides a larger engagement area for positions with higher power and greater efficiency for positions with lower power. This means improved ride quality, better traction, and sustained momentum.Key Features:- Patented Drop-Stop® wide-narrow tooth profile for minimized dropped chains- Perfect for 1x setups- Machined in-house at Wolf Tooth's HQ in Minnesota, USA- Beautiful anodized finishCompatibility:- Compatible with Shimano 110 BCD Asymmetric 4-bolt cranks, including Dura Ace 9000, Ultegra 6800, 105 5800, Tiagra 4703, and Tiagra 4700. - Sizes 40T and larger require a slight modification for use with Dura Ace 9100, Ultegra 8000, and 105 R7000. - This chainring mounts in the big ring position of the cranks but is offset inward for perfect chainline.- Requires 6mm bolts for mounting, which are optimized for single ring setups (sold separately).Please note that this chainring is compatible with 10-, 11-, and 12-speed chains (except Shimano 12-speed chains) for 1x9, 1x10, 1x11, and 1x12 drivetrains. If using a 9-speed drivetrain, a 10-speed chain is recommended for better chain retention.Upgrade your drivetrain with the Elliptical 110 BCD Asymmetric 4-Bolt Chainring from Wolf Tooth and experience a smoother, more efficient ride.