Forever the choice of professional riders numerous victories and podiums have proven criterium the top pro racing tubulardetailsuse road racingsize 28 width 22 weight 255 grtpi 320bead carcass super polybar 7 14psi 101 203challenge tubulars hand made all tubular and open tubular produced by challenge are special products machines are not able to produce them and the manual skill required in each step to obtain a good quality standard is very highthe casing is produced with the latest techn