This enhanced model is based on the original award-winning Jack-IT® carrier, featuring two Stinger™ mounts designed for greater position options when mounting two bicycles over the trailer A-frame tongue jack. Bikes ride over the softest riding area of the trailer frame where they can be seen from the rear view mirror for smooth and ideal space optimization. Universal a-frame coupler fit mounts over the tongue jack Carriers two bikes over the front of the trailer where the least motion occurs Fits front wind manual jacks and electrical jacks up to 22 1/2" height (measured starting from the coupler) Supports bikes by the wheels with Zero-G four-point wheel contact for secure and motion-free bike stability Adjustable wheel cradles for all standard bike sizes and frame styles, rated for bicycles with 22 inch wheels or larger and up to 2.75 inch tires Rated for 40 lbs per bike Includes two interchangeable Stinger mounts (straight and angled designs) for enhanced bike fitment on trailers, improved load access, and multiple settings for secured positioning of bikes for transit. Dense cushion pads protect bike finish NoMotion pin ensures bikes are securely fastened for stable ride 38 lbs empty weight Not rated for use with covers, bags, or other non-Let's Go Aero Accessories Patent protected