B-train truck configurations exhibit superior dynamic performance when compared to most other log hauling combinations, and long log B-trains have similar productivity compared to other long log configurations with comparable axle arrangements. Despite these advantages, long log B-trains can find themselves traction-limited in some forest operations. To address this shortcoming, the Forest Engineering Research Institute of Canada (FERIC) undertook a short-term, in-service evaluation of a long log B-train in combination with a tridem drive tractor. The evaluation included a dynamic performance analysis through computer simulation, the modification of an existing B-train trailer from five axles to four, and monitoring its in-service performance with a log haul fleet. This report discusses the findings of this evaluation and makes recommendations based on observations from the field trial.