Train throughout the winter regardless of the weather with this magnetic resistance trainer. Works with 26 inch, 27 inch or 700c bicycles. Riser Block & Skewer included. Features Heavy duty construction with extra wide frame for stability, folds quickly. Sturdy mounting cups reduce slippage (quick release included). Single adjustment, progressive magnetic resistance. Compatible with 26 in., 27 in. and 700c bikes. Front wheel Riser Block and skewer Included