Seat Solo Chopper Harlery Bobber Sportster Honda Pan Head White Leather Spring. Seat Solo Chopper Harley Bobber Sportster Honda Pan Head White Leather Spring. White Leather Spring Solo Seat. We start with 1/8 steel pan built in our shop. The pan is very thick, rigid, and sturdy. The pan has a kick up in the back to hold you on the seat. The seat is ergonomically correct to provide a comfortable ride. The seat measures 10″ wide x 13″ long. The studs in the rear are 7 apart. Next we lay up and shape high density urethane closed cell foam on to the pan, to give good support and comfort. Then the foam is covered with 100% high quality leather. Lastly, it is sewn together with heavy duty nylon thread, similar to the way a shoe sole is sewn onto the upper. The qualities of this leather are long life, and durability. The shape and profile of the seat is designed to sit low, to give a slim profile.