Hollywood's Sport Rider SE2 2-Bike Add-on Kit lets you carry an additional 2 bikes on your next adventure. It connects easily by sliding the add-on kit into the base unit (sold separately), inserting the attachment pin & clip, then tightening the lever. - Weight: 45 lbs - Capacity: 2 bikes, max 45 lbs per bike - Fits models HR1450, HR145R, and HRT220 - Space between bikes: 10 inches - Not to be used on any trailer, fifth wheel, or towed vehicle