CycleOps The Silencer Direct Drive Magneto Trainer without Cassette Direct drive design features a fixed rear wheel mode Adjustable magnetic resistance allows for true-to-the-road feel, Comes with easy to use 5-level handlebar adjuster Noise level at 20 mph is 59-64 decibels. SHIMANO and SRAM 9/10/11 speed compatible Made in Madison, WI, USA Lifetime warranty Features five magnetic resistance settings Won't have friction from the road It is not easy to travel with