The Jet Black Mag Pro Turbo Trainer comes pre-assembled with adjustable resistance curves for interval / hill training. The re-set remote control enables you to change resistance levels while you are riding. There are 5 levels of resistance, ranging between 5 and 350 Watts. The wide base frame with anti-slip feet offer rock-solid stability for the toughest rider. The super compact, foldable frame is ideal for easy transport and storage. Fits road and mountain bike wheels, from 24" to 700C. A replacement skewer is supplied in order to ensure the perfect fit. The Pro version of this trainer is equipped with a Hydrogel roller that operates quietly and smoothly. Noise is reduced by 55% and tyre wear is reduced by 25-30%.