• Dynamic Inertia Mechanism™ delivers real momentum transfer
• Dual-stage engagement replicates dog-box resistance and preload
• Progressive mechanical feedback
• Tunable shift feel from light-fast to heavy-mechanical precision
• Ball bearing and compression spring damping for authentic engagement

Unlike conventional sequential shifters that rely purely on spring tension, the S1's proprietary weighted cylindrical system translates lever motion into realistic momentum transfer. As you shift, the internal assembly of ball bearings, compression springs, and dampers produces a momentary inertial pulse, replicating the energy kick of an actual racing transmission selector. It's not imitation. It's mechanical authenticity, refined by BDH.

The S1's progressive mechanical setup replicates the resistance, preload, and engagement of a true sequential dog-box gearbox. Each pull or push delivers a purposeful, physical response, starting with initial resistance, followed by a crisp engagement point, and finishing with a natural return motion. This dual-stage system ensures every shift feels deliberate, confident, and indistinguishable from genuine race-car mechanics.

• CNC-machined from solid billet aluminium with hard black anodising
• Ball bearings, compression springs, and internal dampers for consistent engagement
• Machined entirely from metal for lifelong performance under heavy use
• Universal mounting compatibility for left or right-hand configurations

No two drivers shift the same way. The S1's integrated tension thumb wheel lets you dial mechanical resistance from light, rapid engagement to heavy, deliberate precision, without tools, without disassembly, and without leaving your cockpit. Match the feel to the car, the circuit, or your personal preference. Whether you need the nimble flick of a single-seater or the weighted authority of a GT transmission, the S1 adapts to you.