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The Bridgestone M403 is a front motocross tire designed for riders who need dependable control, predictable handling, and durable performance on off-road tracks. This tire uses a 70/100-17 fitment, a bias construction, and a tube-type design for traditional motocross applications. The 40M rating identifies the tire’s load and speed classification, while the directional front-tire profile supports responsive steering and confident line selection.