Pewag “ASV PATTERN” – Heavy Truck – Singles,7 mm The Austro SV (ASV) pattern chain has been engineered to stand up to the most severe conditions where traction is a must. This design provides exceptional lateral and braking traction. pewag ASV chains are depended upon for professional use on heavy duty utility vehicles on or off-road. Welded rings connect the chain mesh to the side chain, which guarantee a long life span. The latest starwave® innovation provides additional grip and a longer life. Easy mounting, with hassle free traction when you need it.