MRP AMg SLR Chainguide - 28-32t, ISCG-05, Carbon BackplateThe MRP AMg SLR chainguide eliminates dropped chains and bent chainrings. It combines a lightweight upper guide and a durable bashguard, mated to a carbon fiber backplate. Unlike the cheap, flexy, and rattle prone upper guides found on other products, the AMg features a premium, stiff, silent upper guide and a tough fiber infused bashguard. Carbon fiber back plate is incredibly strong and lightweight Works with 28 32t round rings (and 26 30t oval