CycleOps Fluid2 Indoor Trainer WORKS WITH ZWIFT: Hop on and ride with others on Zwift, Rouvy, and other online training apps BEST SELLING TRAINER: The CycleOps Fluid2 is the best selling trainer in the USA. Made in the USA with 100% recyclable, non-rusting materials FLUID RESISTANCE IS QUIET AND CONSISTENT: CycleOps Fluid2 powertuned technology makes for a quiet, consistent, ride every time you get on your bike indoors. Noise level at 20 mph is 64-68 decibels RUGGED 2-INCH ROUND 16-GAUGE STEEL FRAME: Tested to the combined weight (rider and bike) of 300 pounds STABLE WIDE FRAME: Adjustable footpads for a stable ride on most surfaces Made from rugged 2-inch round 16-gauge steel Comes with a lifetime warranty from cycleOps Adjustable footpads for a stable ride on most surfaces