The Elite Su-Sta Adjustable Front Wheel Elevator Block is a smartly executed travel block that offers a variety of training options in a compact package. An internal ratchet allows the use to raise or lower the front wheel, simulating slopes of up to 6%. Elite Su-Sta Adjustable Front Wheel Elevator Block Features Unique design with 5 levels lets you adjust the height of your front wheel to simulate hill climbs up to 6% Anti-slip rubber feet eliminate handlebar vibrations Internal design that guarantees maximum wheel stability Suitable for both road and Mtb You can attach to the trainer frame when not in use for easy transport and storage