The s works turbo hell of the north tubular tyre from specialized designed to excel on the roads of the paris roubiax and ronde van vlaanderen the turbo hell of the north feautres specialized gription compound that give better grip and speed compared to other tyres the turbo features a 290 tpi cotton casing give a 15 percent improvement in damping and offer 20 percent less rolling resistance compared to other tyres used on cobblestones the turbo uses a latex inner tube protected with special