Regardless of the weather outside, you can stay in shape with your own bike in the comfort of your home! * Offers effective indoor training in a stiff, well supported frame with little noise - at a reasonable cost * Hooks up to just about any bike--including road and mountain bikes with a 26", 27" or 700c wheel * Easily folds down for travel and storage * Overall unit dimensions (unfolded): 23 1/2" wide x 23 1/2" deep x 16" tall