A combination of smoothness and comfort Pirelli extends its range of premium smartube inner tubes for bike tyres, with the Smartube Evo. : light, with 5% less rolling resistance than the standard version. The SmarTUBE inner tubes family is made of TPU that is a thermoplastic polyurethane characterised by high elasticity and mechanical resistance, and extreme lightness. The new SmarTUBE EVO features a new TPU formula and offers a performance made of flexibility, smoothness, and comfort that can compete with latex inner tubes, while also guaranteeing up to 50% less weight compared to the latter. The new SmarTUBE EVO also allows an extra 5% less rolling resistance compared to the already fast Pirelli SmarTUBE on the market. This evolution of the famous SmarTUBE models has responded to the feedback of the World Tour teams that work with Pirelli, to boost the performance centred on the P ZERO tyres’ lightness and speed, and extends these benefits to all those who love the convenience of the "clincher + inner tube" system. Bright yellow as per "tradition", available in a single version, which covers sizes ranging from 25-622 to 28-622, the new Pirelli SmarTUBE EVO comes with three different Presta valves, completely black: from 42 mm, 60 mm up to 80 mm for high-profile wheels.