Metzeler 6 Days Extreme Off Road Rear Tire - 140/80-18 1623900 OEM fitment on KTM 450/525 EXC models The ultimate off-road tire developed with World Champion factory riders for the most extreme conditions New High Resistance Polyester carcass-material with X-ply construction for superior structural characteristics and excellent puncture resistance Knob distribution and geometry designed to offer outstanding grip and traction with high resistance both in dry and wet conditions, from soft/loose terrains to hard DOT approved