S-Road: At a featherweight 23g the super-compact (when rolled up) S-Tubo-Road stands out with very low rolling resistance which outpaces standard rubber tubes yet is comparable to latex tubes. With 78% smaller packed size (and still fits tires from 18mm to 28mm) and the same puncture resistance as standard tubes the S-Tubo-Road is the perfect choice as a spare and can be the crucial factor when you’re riding long and hard. Ready for disc brakes