CycleOps Fluid2 Trainer. The CycleOps Fluid2 Trainer with PowerTuned technology gives you an improved road like feel, offers the widest resistance range, and provides the most true to life speed versus power contingency, no matter how fast or slow you ride. PowerTuned technology allows your wheel to accelerate and decelerate on an infinite resistance curve, just like it does outside. Larger flywheel delivers twice the inertia to further enhance a realistic road feel. Progressive fluid resistance increases exponentially with speed, sealed cartridge bearings are nearly noise free, and tough frame with asymmetrical feet guarantees a stable ride, no matter what surface you're on.