Rear bumper spare tire mounts are cumbersome and ugly and they make it difficult to install bike racks and cargo trays. Plus they add weight and length to your travel trailer. BAL now offers the 'Hide-A-Spare' Tire Storage System that allows you to mount the bulky tire beneath your trailer and out of the way. This system is very easy to mount and if you ever require access to the spare tire, simple to remove. With three models to fit every type of trailer frame, installation is quick and simple. Self tapper screws mount the two plates to the frame and the knob and pin are removed to lower the 'Hide-a-Spare' to the ground. It then telescopes out for easier access to the spare tire. Made in the USA. Not retail boxed. Limited One-Year Warranty. NON I-Beam Frames (C-Frame, Channel, Box, or Z-Frame) Model 28210 65" to 69" frame width, NON I-Beam Recessed mount for trailers without underbelly enclosure Model 28215 70" to 75" frame width, NON I-Beam Recessed mount for trailers without underbelly enclosure Model 28216 70" to 75" frame width, NON I-Beam Underslung mount for trailers with enclosed underbelly I-Beam Frames Model 28217 70" to 75" frame width, I-Beam Recessed mount for trailers with I-Beam frames without underbelly enclosure Model 28218 70" to 75" frame width, I-Beam Underslung mount for trailers with enclosed underbelly Not designed for use on motorhomes.