Pure Fix Pivotal SaddleThis is a demonstration store. You can purchase products like this from Pure Fix Cycles Developed for stunt bicycling, pivotal seats simplify the bicycle seat's construction and eliminate some of the breakable parts found in the usual adjustable bike seat. We've licensed the Pivotal technology to bring you the most comfortable and durable FGFS saddle in four aggressive colors: red, black, white, and grey. Note: These saddles require a pivotal seatpost!