Wide-base single tires are receiving renewed interest in the forest transport sector due to their inability to capture rock, as happens with dual tires, which can improve road user safety. Potential fuel efficiency gains are also attractive and, in support of this, the fuel consumption of a 9-axle tridem drive B-train truck was measured relative to a control truck under the following conditions: baseline, wide-base single tires on truck and trailer, and wide-base single tires on trailer only. The fuel consumption differences were insignificant, but the reductions in tare weight were significant. The tare reduction can be best used to carry more payload and increase revenue. Other potential benefits of wide-base tires are related to improvement of vehicle, operator, and public safety. Recommendations for implementation and economics of fitting wide-base single tires are discussed.