Unit D10: Challenger MT 765D Wide vs Narrow Tracked Row Crop Tractor Posted on January 12, 2019 (January 12, 2022) by Alex Barrie in Compaction Test Results Datasheets Plot Comments The weight of this machine can be distributed over a wider track and reduce the stress at 6 and 12 inches.However, the stress at 20 inches was very similar for both the wide and narrow tracks.