The Pilot HM4 is a four bike, hitch style platform carrier for 2 in. hitch receivers only. This modular carrier can be used as either a two or four bike rack. This flexible design with expansion capability makes the Pilot HM4 a great choice for changing needs. Cross-town transport to the trails or loaded up for a road trip, the Pilot HM4 provides safe and confident transportation. Constructed of powder coated steel, this bike rack requires a 2 in. receiver. The padded ratchet arms hold the bikes securely by the front wheel. Ideal for carbon framed, full suspension, and fat tire bikes. Lifetime Limited Warranty. Some assembly required.