What Our Gearhead(R) Experts Are Saying: "I added the Co-Pilot 2 Module to my Pilot HM2 rack, and it instantly turned my setup into a four-bike hauler. The ratcheting arms feel rock solid on my carbon frame, and there's no contact between bikes. It's quick to load, and the integrated lock gives me extra peace of mind." We count on the Malone Auto Racks Co-Pilot 2 Bike HM2 Expansion Module to make big group rides simple and stress-free. Designed to integrate seamlessly with the Pilot HM2 platform rack, this modular add-on transforms a two-bike carrier into a secure four-bike system without compromising stability or ease of use. Constructed from durable powder-coated steel and aluminum, the Co-Pilot 2 supports bikes up to 33 pounds each and accommodates wheelbases from 24 to 46 inches. Padded ratchet arms secure bikes by the front wheel to protect delicate carbon frames and keep bikes separated. With space for fat tires up to 5 inches wide and an integrated lock cable for added security, this system keeps all our bikes safe and ready for the next ride.