Measurable and repeatable workload6.25 lb. flywheel for realistic coast-downPower Calibrated Resistance UnitFits 22"-29" WheelsSmall Wheel Adapter Required for 16" - 21" WheelsCompatible with Pro FlywheelSealed fluid chamber with magnetically coupled driveshaftThermodynamically neutral silicone resistance fluid15-second coast-down from 20 mphConsistent resistance at multiple temperatures80 cooling fins to dissipate heatLowest operating temperature of any fluid trainerSmooth, quiet resistance from 5-3,000+ wattsGuaranteed not to leak2 1/8” roller reduces tire wearUnconditional Lifetime WarrantyLifetime Crash Replacement Policy