EJDER model was created by the combination of the drop forged bar studs, drop forged spiked studs and welded U-studs. Welded U- studs provide excellent grip with reducing contact area, and with the endurance of drop forged bar & spiked studs EJDER model well-suits for heavy-duty forestry purposes on difficult grounds and designed for all type of forestry machines. Side Chains: 13 – 16 mm Wear & Connection Rings: 16 mm Drop-Forged Bar Studs (Traction Links): 15 mm Welded U-Studs: 16 mm Drop – Forged Spiked Studs (Traction Links): 14 mm • Standard design is without tensioning chains but also available with tensioning system.