Quick Products RV Bumper Mounted 2 Bike Rack. The rack features two platforms that easily mount to your 4" to 4.5" square bumper and give you completely customizable control over the width ensuring that your bike fits perfectly every time. Slotted tire wells hold each bike securely while a convenient stabilizer post provides an anchor to both support and fasten your bikes to. Will not fit fat-tire bicycles or bicycles with wheels over 29". Weight should not exceed 30 lbs. per bicycle. Caution: Before installation be aware that RV manufacturers may place load restrictions on their vehicles bumpers. These load restrictions must be followed to create a safe RVing experience. If you are unaware of your bumpers load restrictions please consult your manufacturer for information to ensure safe use. Install only on continuous-weld steel bumpers. Features of Quick Products QPRBM2R RV Bumper Mounted 2 Bike Rack Conveniently carry up to two bikes from your 4" to 4.5" square bumper Adjustable mounting allows a fit for nearly any length bicycle All-steel construction powder coated for corrosion resistance 30 lbs. weight capacity per bicycle Will not fit fat-tire bicycles or bicycles with wheels over 29" Package Contents: Quick Products QPRBM2R RV Bumper Mounted 2 Bike Rack Quick Products QPRBM2R: RV Bumper Mounted 2 Bike Rack