This is Alex from Tandem Offroad.
We have been working on a bumper for the 5th gen 4Runner bumper for a bit and I think it's finally at a point where we can show it to you guys.
Our design priority was to have a shape that would offer the highest amount of ground clearance possible without making any significant modifications to the frame and the body. To this end I believe that we have succeeded. The bumper hangs about a half inch lower than the body frame.
Weight of the bumper is approximately 160lbs without the arms. The weight of the arms is not exactly final yet since we are working on a modular design.
To maximize ground clearance we did not include the hitch into the design, however, we are working on something that works similarly to the factory design that ties into the lines of the current bumper.
The dual swing outs are opperated by a single latch. The locking pins have three positions for 0, 90, and 140 degrees. We used stiff rubber bumpers to interface between the bumper and the swing outs since noise elimination is a high priority. We will most likely transition to delrin for the final version.
I'd love to get some constructive criticism as there is still a little bit of time left to make some changes before we go into production.