A nearly indestructable rear rack made of lightweight and rugged titanium Holds the world record for carrying capacity to weight ratio for rear bicycle racks Weighs half a pound and can effectively carry more than 57lbs The Airy comes with two roundstays for seatstay mounting, but it can also be mounted with one of these, as a centrally roundstay Compatible with 26` and 29` wheel sizes Not to be used with child carriers