I don't know about you but a bicycle seat just doesn't get it when you're going down the street at 35 or 40 mph. I don't want my back side hanging out over the rear tire. I want to get down in and have better control. I looked every where for such a seat for my 29er and couldn't find anything but solo motorcycle seats that would require a lot of modification to my bike. I made a fiberglass seat pan in the shape of a bicycle seat but its 15 inces long and 10 inches wide at it's widest point. I padded it with foam rubber to about 3 inches, covered it with a nice hand stiched marine vinyl and used a large seat mounting and springs. I just tested it and it is great.