Surly's burly line of tubular Chromoly steel racks have been used on expeditions all over this planet for years. This version here is for use with seatstay-mounted disc brakes. Offered in two versions: standard and wide. Both feature the same stainless-steel mounting hardware (handily housed in a reusable Surly Tool Bag), but they feature different widths to work with various tire sizes. They’re both height adjustable and can fit a wide selection of wheel sizes, while allowing you to keep the center of gravity as low as possible for a stable ride.