Visp Trx790 Alloy Fixed Gear Fixie Frame Model:TRX790 Material: Aluminium 6061T6,Rear ends Dropouts Forged steel Size :700Cx54/56/58/60CM(C-T) (From B.B center to seat tube top end) Frame rear dropout space 120(+/-1)mm. Seat post?size request diameter 27.2mm