Indoor Bike Trainer Bicycle Exercise Stand 5 Resistance Levels Brand new in retail packaging / Heavy duty stand / Stand folds for easy stoarage and travel / Dimensions: 21.4 X 19.4 X 15.5 21.5" extra wide frame base provides mzximum stability / 5 levels of magnetic resistance adjustable by your handle bars Mounting cups ensure that your bike won't slip out of your trainer Engineered for fast setup and removal / Foldable and highly portable - take it anywhere you or leave it in the trunk Clamp locks down on quick release on bolt on rear wheels / Will work with road bikes & moutain bikes with a wheel of 26, 27 or 700C Wheel