The F10 booster provides the perfect combination of increased load capacity and convenience. The fish-mouth design attaches to beavertail-type trailers with ease, saving you valuable time. And, our patent-pending booster stability system locks the booster axle in a straight position when you’re travelling over 60km/h for safer, easier handling on the highway. It also locks the booster axle and dumps suspension air when backing up straight for safer, easier, and more stable reversing ?— all without you having to leave the cab.