I was thinking of getting the "power up" set with 15f/48r, the current aluminum (rk/vortex/?) rear sprocket is pretty worn and the front is pretty noisey. I also wanted lower cruising rpms, the bike has to be pretty rapped out to cruise. The kit I'm considering has the steel rear sprocket instead of aluminum alloy and a "wave" design so its lighter and supposedly lasts considerably longer. Anyone used this set?

I really need to check the tooth count on the front because the rear sprocket has the oem 48 count, I'm hoping the front is a 14 so I can get a little improvement with a 15.