Explore new and used CHALLENGER MT645D 175 HP to 299 HP Tractors for sale near you on TruckWorld! Find CHALLENGER MT645D 175 HP to 299 HP Tractors you need on TruckWorld! Can't find the exact CHALLENGER MT645D Tractors you need? Post a free Want-To-Buy and get notified when it's available. Browse and search our easy-to-use site for a wide range of 175 HP to 299 HP Tractors and more from listing members like Heitman Tractor Salvage and others.