Smooth center for easy rolling with shoulder siping for all weather tractionGreen Compound is manufactured from natural rubber obtained from renewable rubber trees and from recycled rubber materialsPGRD - Puncture Guard, Affordable 3mm rubber breaker belt EBIKE25 - has achieved a passing rating for use with E-Bikes up to 25kphStandard26x1.5559WireBeltedBk/Blk8576050REF/PGRD/EBIKE25YesUPC/EAN/GTIN: 4026495907095