SRAM Rival D1 40T Aluminum ChainringSRAM X SYNC wide tooth, narrow tooth chainring technology provides maximum chain control Laser etched chainring finish is more durable X Range gearing technology gives you more range and a smoother gear progression, so you're always in the right gear NOTE: This is a take off item from a showroom bike. It is brand new, and never ridden. It does not include hardware or original packaging.