The Fizik Aliante Gamma XM with K:ium rails is the choice of riders looking for a perfect match of performance, comfort and value. Features a nylon carbon reinforced twin flex shelll that helps add comfort and keep weight at a minimum. Fizik’s K:ium rails are strong enough to stand up to any punishment you can dish out. A Microtex cover cover keeps you in place in even the worst conditions. Weighs in at 259 grams.