because dynastar edges are like butter on rails. not all edges are made equal. eventually, certainly, all edges crack, but the rate which the dynastar edges go is amazing. they are excellent skis, but the durability from rails is an issue. and no it is not hype. those who ride their skis hard on rails do have problems, more so than a lot of other brands. but i am not knocking dynastar, their skis are dope, just not on rails