Viper Magnetic Indoor Bicycle Trainer - Ideal for indoor training - Bike in the comforts of your home - Avoid Covid19 virus by staying indoors while exercising - Designed for use with 26', 27.5" or 700C wheel sizes. - Maximum load: 150 kg. Includes: 1 Viper Magnetic Indoor Bicycle Trainer (Manual or 6-Level Resistance) 1 Replacement Rear Axle Skewer 1 Front Wheel Riser Block