take your bikes along for outside your rv bolts securely to 4" and 47" square welded steel bumpers to hitch-mounted accessory anti-sway cradles prevent bike-to-bike contact mounts around most spare tires on the back of travel trailers or 5th mount a bike carrier on your ladder to free up your hitch attaches to l" diameter rv ladder and is be pulled to easily give you access up and you to chemicals including dil2 phthalate dehp and lead which are known to the state of california to cause cancer and birth www provides 2" receiver for a bike rack mounts to the a-frame at the rotate to fit various frame widths telescopes to rise above propane tanks or generators already mounted on the trailer frame and creates a 2" receiver that can fit any required for installation legs rotate for different size frames mounts on a-frame telescopes between seat post and stem post to let girls' bikes sit level