The specialized fast trak sport is all about speed and control with a unique tread design that has had each knob manipulated after fe analysis paired with extensive rider feedback and design experience the result is an xc tyre with less rolling resistance more traction and a rugged casing that39s ready for absolutely anything specialized fast trak sport tyre features casing 60 tpi bead wire compound 70a 26 x 20 psi 35 65 approx weight 650g 650b x 20 psi 35 65 approxi