GOODYEAR TRANSIT SPEED S3 700x40 BLACK WIRE RFL/DYC/E50Round profile with mostly smooth tread and deep siping on the shoulders for improved all weather traction EBIKE50 has achieved a passing rating for use with E Bikes up to 50kph and is ECE R75 approved REF Reflective sidewall striping or hotpatch to aid in low light visibility DYC Dynamic Compounding, formulated for on road applications with an emphasis on durability S3 shell protection 3mm aramid infused sub tread layer provides effective puncture