Knurled shoulders K-Shield belting and deep siping make this the go to trekking/urban tire. 3mm K-Shield belting beneath the tread surface for improved longevity and puncture protection. Reflective sidewall accents from improved night time safety. SRC - Standard Rubber Compound combines the best attributes of low rolling resistance extreme durability and tread longevity. REF - Reflective sidewall striping or hotpatch to aid in low light visibility. KS+ - Increased thickness of the K-Shield to 5mm to create a the best balance of flat proof and maintaining great ride quality. 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