Unit D41+D8: Loaded FlatRack Hay Wagon Tandem Rear w 12.5Ls + NH TS115A Singled Row Crop Tractor Posted on January 17, 2019 (January 17, 2022) by Alex Barrie in Compaction Test Results Datasheets Plot Comments Again, A wagon, similar to the gravity wagons. High pressure bias ply tires creating high soil stress.The tractor in this instance was not measured.