Your bicycle is more than just a frame, tires, handlebars and pedals. You live for what might be around that next turn, that burn in your legs as you climb a rocky trail and that freefall feeling you get as you descend a long hill. Your bike is not just a hobby; it is a gateway to the outdoors and your faithful companion in the wild. It was with this idea in mind that the CURT tray-style bike rack was built. From the BMX track to the paved trail and everything in between, bicycling is all about the ride. The CURT hitch-mounted tray-style bike rack promotes your biking experience unlike any other because of its unique, three-point support system. It is made to be easier to use and keep bikes more secure, holding them at three points of contact. To increase security even further, this set of locking knobs can be used to replace the knobs on the adjustable vertical arms of the tray-style bike rack. The knobs are key-operated and ensure that only you have access to your bikes. Two knobs and two keys are included in this package.