Round profile with micro-siped knobs and carbide studs for traction on iceThe spikes work best on ice when running at minimum pressure, while at maximum pressure the tires can be ridden on ice-free roads with minimal road noise*To ensure proper spike seating the tire should be run for roughly 25 miles on asphalt while avoiding fast acceleration or hard brakingSGRD - Smartguard equipped tires feature a 5mm breaker belt made from special Indian and partially recycled rubberStudded26x2.15559WireBeltedBk/Blk55135067SGRDYes188UPC/EAN/GTIN: 4026495889841