Today I installed a 12" wide overhead rack- a place to store a jacket, hiking stick, binoculars, energy bars, ramen noodles, pringles chips. A piece of plumbers strap is supporting the center.
- I might put a 16" wide one somewhere in the back. I can store extra bedding ,clothes, towels, etc., on it. I just have to make sure it won't turn into a head knocker. You can only store lightweight items on the overhead racks in order to keep the center of gravity low.