Most of the Sunday team has been riding guard sprockets for a long time, so it was just a matter of time before we did our own.  The Knox sprocket is made of 7075 aluminum and comes with a full guard on 1 side of the sprocket.  Even more important is the fact that it’s designed to fit larger chains like half-link chains.  It’s made super strong and will help you protect your chain from being hit when slipping off a rail or messing up on a crankslide.