With an a1 premium aluminium frame track specific geometry a fact carbon fibre fork and a tough as nails build kit you39ll find the specialized langster to be just as comfortable riding on the boards of the velodrome as it is along the streets of the city specialized langster singlespeed bike 2016 features a1 premium aluminium frame with track specific geometry has fully manipulated tubing and impressive overall stiffness making the langster a formidable threat on both the track