Soozier Adjustable Magnetic Resistance Indoor Exercise Bike Bicycle Trainer Stand - Gray Five internal resistance settings This "Trainer" is one of the quietest on the market Easily folds down for travel and storage Bike mounting system locks down easily on quick release or bolt on rear wheels; 26", 27" or 700C wheels Overall unit dimensions (unfolded): 23.5"W x 23.5"D x 16"T