Maxxis - 27.5" MetroloadsMAXXIS 27. 5" METROLOADS The Metroloads family of tires is Maxxis solution for cargo bikes. A heavy duty casing and thick tread extrusion ensure you can load up your cargo without worry. The Metroloads Pro uses a dual ply casing for even more durability. Designed for commuter and cargo bikes Reflective sidewall stripe 4 Season Compound E50 certification for pedelecs Pro specs use dual ply casing and thicker tread