Here is why we built our disc guards the way we did.
Our goal when designing these disc guards was to provide superior protection while keeping weight to a minimum. The more weight you add to the rear tire the harder it is for the shock to respond to terrain. That custom shock re-valve might not perform as well as it could with a large chunk of aluminum bolted to the rear axle. Instead of just screwing a disc guard onto the brake hanger we designed our disc guard so that the rear axle passes through both the brake hanger and the disc guard . This design means that the force from an impact transfers straight back through the disc guard into the rear axle and not through a screwed on disc guard and then into the brake hanger. Our disc guards protect the front and outer edge of the brake disc where impacts typically come from while leaving the center mostly open. The open center reduces weight while also giving mud very little surface area to stick to adding even more weight or building up and dragging on the rotor. A square outside edge tends to hang up on rocks or logs. The inside of the guard features a minimal chamfer giving debris less chance to get between the guard and the brake disc.
Our disc guards offer a lifetime guarantee.