Giant's Cyclotron Mag II Trainer is a versatile tool that lets you ride whenever you want, regardless of weather, daylight or schedule issues. It features a heavy-duty steel frame for a stable base when you're cranking and a quiet magnetic unit that provides 7 levels of resistance when activated by the handlebar mounted thumb shifter. Non-skid adjustable leveling feet ensure your bike is secure while you pedal. Plus, this trainer includes an easy-to-use steel quick-release lever.
The Cyclotron fits most wheel/tire sizes from 24-29 inch