Low profile center blocks roll quickly across the trail while the siped transition knobs and shoulder blocks give purchase on almost every trail condition. Dual Tread compound and sealant compatibility in standard or racing (TR) formulas. DTC - Dual Tread Compound is a combination of two different rubber compounds L3R Pro (center knobs) and Stick-E rubber (corner knobs). TLR/TR - Tubeless (Light) Race is the lightest tubeless ready version of tires Kenda offers and also features an improved bead shape for better retention. EMC - is the first tire casing on the market specially designed to meet the requirements of e-mountain bikes and offers an additional layer of puncture protection. EBIKE50 - has achieved a passing rating for use with E-Bikes up to 50kph and is ECE-R75 approved. *Please note that EBike rated tires also can be used with non-Ebikes and are generally more durable than standard tires