The trek top fuel 98 sl mountain bike 2017 is back and faster than ever before refining and re invigorating the design that ruled the podium at the height of mountain bike racing the top fuel is the fastest bike on the trail without question versatile and supremely quick the trek top fuel sl is the perfect choice for any cross country racer or marathon rider who takes their performances seriously it39s even the ride of choice for trek factory racing world cup team features on