It is true that when you take to the roads you should be listening to nothing other than the silence of your perfectly tuned machine, with only the wind and the humming of the rubber to the road to break the pure silence. Thus the perfect cycling soundtrack. But once your training moves indoors the sounds shift. It is now critical to shape the tempo as you spin, mash, pump and grind along in your own little pain cave. This sonic cyclo-sphere will be the mosh pit that gets you through your intervals and tempo sessions and hopefully guarantees that come springtime, you are ready. You are the hamster- spinning infinitely with only the pellets of your favorite driving Eminem beat as your motivating fuel.