The NSB-141 nitrogen spreader bar and NST-141 nitrogen stinger from Pitts Trailers combine the classic 14-foot 1-inch booster axle spread with a nitrogen accumulation system and hydraulic cylinders. This system allows the operator to set the exact weight desired on the booster axle and maintain that setting through varying road conditions. Outfitted with a gas-powered pony motor the hydraulic settings and adjustments can be made quickly and effortlessly. Backing up is achieved simply by popping in one pin and raising the unit off the ground.