Med-Fit Systems 2009 Schwinn® Airdyne Evolution Comp The Schwinn® Airdyne® Comp's resistance-based braking creates zero friction and considerably less maintenance than other, more complex systems. Sealed cartridge bearings provide a smooth ride, reliability and extra-long life.     * Resistance-based braking creates zero friction and provides considerably less maintenance        than other, more complex systems     * Sealed cartridge bearings provide smooth ride, reliability and extra-long life     * Durable steel frame helps ensure a quiet ride     * Small, quiet fan-wheel cools user during exercise     * Low step-over height makes mounting and dismounting easy     * Ideal for rehabilitative use 1.800.831.7665 1.800.831.7665