Look, we all know trains > belts, but thats not the case right now. NO MORE!!!

Now there are 3 new cargo wagons and fluid wagons. Tungsten, Holmium and Carbon Fiber.

Tungsten doubles the capacity.
Holmium features default capacity with a weight loss of 50%
Carbon Fiber fuses tungsten and holmium wagons to create the ultimate wagon with 3x the capacity and a 20% weight reduction. OMG!!!!