When you're in a hurry: With only 23g the super-compact (when rolled up) S-Tubo-Road stands out with its very low rolling resistance which outclasses standard butyl tubes yet is comparable to latex tubes. With its 78% smaller packing size and the same puncture resistance as standard butyl 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. Specifically made for disc brakes (not suitable for rim brakes). Tubolito is a huge contribution to our weight saving efforts. Smallest and lightest bicycle inner tubes worldwide*