Introduced by Mad River, the Harmony Canoe Seat Truss is a one piece unit that suspends the seat, providing increased stiffness, strength, and efficiency. This is a molded truss made of synthetic materials and provides a maximum of 4 in (10cm) drop.
I have a Mad River Explorer 15 Royalex canoe and I needed to replace the old worn out seats. While I was doing that, I figured I'd replace the weathered seat trusses as well. I opted for these synthetic trusses so I didn't have to worry about them rotting or weakening over time (I store my canoe indoors). The trusses were super easy to install and lined up perfect with the original hardware. I simple removed old seats and trusses, cut new seats to size, installed new synthetic trusses and seats and snugged tight with original hardware. Removing old seats, cutting and installing new seats along with new trusses took less than an hour. The seats are solid as a rock now and looks great!