Rage Power Sport Tubular steel bicycle rack specifically for rear square tube styled RV bumpers to carry 1-2 bicycles. The 24" L x 20" W RV Bumper Bike Rack attaches to a 4" -4.5" RV bumper with a 6.5" U-Bolt. Includes an "L" shaped 19.5" support for bicycle tie-downs and will work with bicycle tires up to 1.75" wide. Maximum 60 lb. capacity.Transports 1-2 bicycles on an RV or camper trailer bumper (max 60 lb. capacity). Designed for 4" to 4.5" square RV bumpers, installs with (2) 6.5" U-bolts around the RV bumper. 1.75"W Tire wells with 6.5" spacing between wells, 4.5" from bolt to first well. Single L-style support tie-down 19.5"H brace (bicycle tie-downs sold separately). Heavy duty steel construction with a black paint finish