The Mandible is tough enough for any type of use, including mountain bike, triathlon style brackets, and cobble-esque road riding. Designed for lengthy rides, The Mandible is strong but light, and work better than anything else available. The average American adult watches nearly five hours of television per day. As such, the Arundel Mandible may seem a little over the top, but only to those who watch more TV than ride their bike. Naturally, you don't have to ride 5 hours a day to qualify to buy a Mandible cage, but it's designed for those who do. The Mandible strong but light, had to work, and work better than anything else available. The sexy curves belie the inherent strength of the Mandible. How can anything so seemingly fragile be so strong, you ask? Because the shape of the arm.