The specialized roubaix pro road tyre is what most cyclists call a game changer it39s an endurance road tyre for epic rides from smooth country roads to rough field roads like all competitive road tyres the roubaix is fast but unlike its competitors it features unique casing technologies for added comfort and puncture protection the specialized road tyre comes in two widths the 23mm tread handles quick and the 25mm casing smoothes your ride and keeps you fresh both