This Sport bottle cage from Arundel is basically a modified 'Dave-O' shape and is made of Nylon reinforced plastic. The Sports cage is as tough as nails and hold bottles well in all conditions and any application. They have two sets of mounting holes to allow the best fit possible. Arundel consider this cage as good as anything they make, it’s just made from different stuff. The extra set of mounting holes are 20 mm lower giving extra clearance from the top tube.