A neat lightweight direct mount retainer ring option for our chainset.Key Features:Direct mount retainer ring designed specifically for our chainset.Saves weight without need for a seperate spider.Able to run a broader range of smaller chainring sizes.The narrow/wide chainring is designed to retain the chain without the need of a chain device.Quieter drivetrain and less drag.CNC machined 7075-T6 aluminium gives the perfect blend of lightweight and strength.Compatible with 9spd, 10spd and 11spd set-ups.Hard anodised finish makes them ultra durable and increases longevity.12% Ovality on Oval Standard."Direct mount spiderless retainer ring to fit our chainset"Spiderless Chainring Tech Specs:Sizes range from 26 to 36 tooth.Weight:62g for a 32 tooth.Offset to give a perfect chainline.Choose between Standard or Boost to get the best possible chainline.