SWITCH. A QUICK-CHANGE DIRECT MOUNT CHAINRING SYSTEM FROM ONEUP COMPONENTS. Switch was developed to reduce the cost of replacement chainrings, increase compatibility with new offsets and to make the process of changing your chainring much faster and simpler. ~ Cheaper Replacement Cost - Replacement rings are a fraction of the cost of a complete direct mount chainring ~ Quick Change - Replace your ring in less than an minute, using only a 4mm hex key. Tailor your gearing to the terrain that you're riding ~ Enduro World Series Champion Winning Narrow Wide tooth profile keeps your chain in place on the roughest terrain ~ 4 Ring Sizes (28, 30, 32, 34T) ~ 2 Profiles - both Round and Oval ~ 12 speed ring designed to work with all 8, 9, 10, 11, and both Shimano Hypergilde+ 12 and SRAM Eagle 12 speed chains. ~ Get ultimate traction with Oval rings by smoothing out the torque you deliver to your rear tire Quick Change Rings can be replaced in less than a minute with only a 4mm allen key, without removing your crank. Simply loosen the bolts 2 turns, unlock the ring by rotating it by 20 degrees and pull it over and off your crank. Reverse these steps to install your new ring. If you plan to ride a trail that you know is steeper than your local trails, you can switch to a smaller ring in the parking lot, in less time than it takes your friend to put on his riding shoes! SPECS Material : 7075-T6 Weight : 69g (30T Oval) Chainline : Standard is controlled by the crank. Compatibility : Shimano direct mount XTR M9100, XT M8100, SLX M7100 series cranks. Color : Black Oval Rings : ~ 12% ovality (32T is equal to a 30T-34T range) ~ 115° clocking from crank arm puts the major axis in your power stroke Installation: Align the small bump on the edge of the carrier with your crank arm. Install ring onto carrier and tighten bolts to 8Nm. All 4 bolts need to be backed off / tightened to Switch rings (anti-clockwise is tightening from the outside / on bike position). Use some grease on the Switch bolts and tightening with a wrench FULLY ENGAGED in the bolt. Please visit our website at http://www.ecomtb.com.my OR https://shopee.com.my/eco_mtb ** There is 1-3cm errors due to manual measurement. Please kindly understand. ** Actual product colour may slightly vary due to photographic lighting sources or your monitor settings. ** WE DO NOT DO COD ** ONLINE ONLY ** We support original products only. ** PRICE INDICATED IS ALREADY BEST PRICE, EXCLUDE COURIER