- These robust wagons are very easy to operate. They feature many solutions for improved work performance. The BEL-MIX Optimal feeder wagon has a ring around the tank top edge to prevent spilling of the feed. This is especially handy when the fodder includes much hay, straw or grass silage. The BEL-MIX Single Rotor wagon features an electronic weighing system with four independent weighing sensors a...nd 15 programmable feed recipes. The system displays the total weight of all ingredients and helps in the precise batching of the ingredients according to the recipe. Solutions for improved working are also included. The BEL-MIX Double-Rotor wagon is controlled from the tractor cab with the DCV, which limits the operator’s exposure to noise and vibration levels. All our feeder wagons perfectly shred and mix the feed components.