Nokian Hakkapelitta 26 x 1.95 W240 Studded All Black Wire Bead with 240 Studs. Nokian Hakkapelitta 26 x 1.95 W240 Studded All Black Wire Bead with 240 Studs. The Nokian Hakkapelitta winter tires feature steel studs with carbide pins for incredible traction on snow and ice. It is not uncommon to lose 5-10 studs during normal use due to friction. This does not affect performance and is not considered a defect for warranty claims. WE DO SELL THE REPLACEMENT STUDS & INSTALLATION TOOL. Non-toxic 58a winter rubber tread compound provides excellent grip on snow and ice. Nokian's final stage in production shrinks the rubber around the studs.