The specialized sworks stumpjumper fsr 29er mountain bike 2017 is the ultimate trail bike taking years of experience to create the most complete ride in terms of on trail performance the carbon layup for the s works stumpjumper consists of top of the line fact 11m material creating an ultra lightweight strong and stiff construction the carbon molding process also allows for the revolutionary swat door tool system solution on the down tube this compartment will fit a tu