Hutchinson Cobra Tubeless Light Tire Tubeless Light technology allows this tire to be run 'tubeless' without use of any special sealants. The Tubeless Light technology provides an airtight seal throughthe use of a thin Butyl layer inside the casing Cobra is a fast rolling tire aimed at XC, Marathon and Trail riders. 127tpi casing is supple and lightweight. Only 650 grams Cobra is perfect in most conditions. The center knobs hook up well in dry, stony, sandy or wet conditions and the aggressive side knobs hang on in the turns.