I.R.P. - Because they wwwoooooorrrrrrkkkkkkkk..... In my personal experience, and from talking to other racers, about 90% of the sliders out there are cosmetic. It's funny how like 5 years ago everyone would ask me what the "Toilet paper rolls" hanging off my bike were. Now every friggin squid out there has them. Carbon look, light-up, chrome (<---What!), it's just wrong that they now give poser points for what is supposed to be a racers tool. I guess in the end it does make sense though, these guys crash more than most racers I know...