The Racing Sport 2.1 is aimed at the larger athletic rider. Featuring a durable nylon saddle shell and CrMo rails the Racing Sport can withstand many racing and training miles. The AirSpantm system with integrated pumprelease valve gives you infinite tuning possibilities and allow you to find the perfect firmness setting for the way you ride. Tech Specs Cover Durable micro porous composite cover breathes for cool comfort Abrasion resistant material protects side scuff zones