Here’s a side view. It touches. I was able to easily use a sissybar mounted bag on the ride to Durango. A strap will pass underneath. The seat is a diamond-stitched Mustang Super Touring Solo, with Mustang Passenger Seat and Backrest and Rider Backrest that the original owner had modified a wee bit. Passenger backrest goes on and off easily. Rider backrest works spiffy.