The Wolf Tooth Elliptical 110 BCD Asymmetric 4-Bolt Chainring for Shimano Cranks is not only beautifully machined and lightweight but uses a patented wide-narrow design that is perfectly suited to 1x setups – dropped chains are a thing of the past. Unlock your dream drivetrain configuration and satisfy your inner tweaker.Bred from ice-cold Minneapolis winters and explicitly designed to work perfectly on anything from a cyclocross, to a gravel or road bike, this Wolf Tooth 110 BCD Chainring means more time riding and less time fumbling with dropped chains.In line with Wolf Tooth’s guiding ethos of providing unrivaled design innovation, reliability, and durability, this chainring employs a patented Drop-Stop® wide-narrow tooth profile which not only keeps the chain securely in place on single chainring setups but dislodges mud, dirt, and excess precipitation more efficiently. For additional security in extreme conditions, this chainring is best used with a clutch-type rear derailleur.Synonymous with ultra-high-end custom builds and stalwart steeds alike, Wolf Tooth chainrings are machined entirely in-house at Wolf Tooth’s HQ in Minnesota, USA. The anodized finish and machined lettering that adorn every chainring bear the hallmark of master craftsmanship.PowerTrac:Wolf Tooth’s PowerTrac Elliptical (PTE) design, as the name indicates, is driven by a concern for power and traction – and crucially for you, premised on a wealth of knowledge from precision engineers who also love to ride bikes.A growing number of riders are converting to elliptical chainrings on 1x setups for the simple reason that they have been demonstrated to improve ride quality.The idea behind elliptical chainrings can be summarized as follows: biomechanical power output varies throughout a pedal stroke. Positions where power is higher have a larger diameter section of chainring and thus a greater engagement area, which translates into greater forward propulsion. At positions where biomechanical power is lower, a smaller chainring diameter means greater efficiency in rotation. Overall, what this means for you is maximized power output throughout each pedal stroke.Wolf Tooth notes that elliptical rings also mean steadier torque on the rear wheel as there is less spinning on the downstroke and easier rotation as a result. Steadier torque on the rear wheel gives better traction and sustained momentum – great on tough climbs and through headwinds.If you’re a discerning cyclist looking to invest in a premium-grade chainring that’ll outlast its competitors and function perfectly on a 1x setup, this is the only way to go.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:- These rings are for use with Shimano 110 BCD Asymmetric 4-bolt cranks- Compatible with Dura Ace 9000, Ultegra 6800, 105 5800, Tiagra 4703, and Tiagra 4700- Sizes 40T and larger are compatible with Dura Ace 9100, Ultegra 8000, and 105 R7000 but a slight modification is required due to a change in the crank arm profile. The 38T chainring will not work for this modification. Click here to review the process for the modification, which takes about 5 minutes to perform.- This chainring mounts in the big ring position of the cranks but is offset inward for perfect chainline- The stock 2x bolts will not work. You will need 6mm bolts which are optimized for single ring mounting, and available separately from Wolf Tooth- Wolf Tooth’s patented Drop-Stop® wide/narrow tooth profile for ultimate chain retention and mud shedding ability- For 1x9, 1x10, 1x11, and 1x12 drivetrains (including SRAM Eagle): - Compatible with all 10-, 11-, and 12-speed chains except Shimano 12-speed chains - If using a 9-speed drivetrain, use a 10-speed chain (shifts and works well on a 9-speed drivetrain and fits the ring tighter for better chain retention)- Chainline - 47.5mm