The Kurt Kinetic Cyclone 2.0 Wind Trainer uses a dual fan design to offer truer, road-like resistance and lasting durability. Two 2.2-pound fans deliver quiet, speed-sensitive resistance at any wattage or speed and a 5-second coast-down offers a real road feel experience. The Cyclone boasts a wide, precision machined roller to reduce tire wear, and a sturdy folding frame with a secure and easy to use bike mount. This trainer is fully compatible with wheels measuring 26 to 29-inches, including 700c and 650c, and also tandems and bikes with quick-release skewers and nutted axles. The trainer folds for storage and portability and has a lifetime warranty.