The CyclOps Fluid 2 Trainer offers a smooth quiet road feel with PowerTuned technology that produces the widest range of resistance at real world speeds and allows for resistance level changes without using a lever. Power (watts) varies from 20 to over 725 watts (at 22.5mph), allowing for intense interval workouts or hitting and maintaining your heart rate targets. The large, inidually precision-balanced flywheel allows for improved road-like feel, with self-cooling mechanisms including a patented fan design that keeps the unit performing better, longer. The noise level at 20 mph is a super quiet 64-68 decibels. The eccentric leveling feet allow for easy adjustment on uneven surfaces and the trainer features a clutch knob for perfect roller to tire tension. Foldable Classic frame for easy storage. Trainer tire recommended. Accepts any road or mountain wheel.