We realize it's pretty hard to be excited about riding your bike indoors but sometimes you just have to train even when it's impossible to do so outside. That's where the Kinetic Rock N Roll Bike Trainer comes in. It converts your normal road bike into an indoor bike and makes riding it feel realistic thanks to the unique spring mechanism and suspension system. When you sprint, you can move your bike from side to side like you would if you were on the road. The Kinetic Rock N Roll also gives you cycling resistance via its leak-proof Fluid Resistance Unit. The whole thing even comes with an unconditional lifetime warranty.