2-3 week lead time — all units are handbuilt to order.

The BDH S1 Sequential Shifter is engineered to replicate the true mechanical sensation of a race-car dog-box gearbox. Featuring the industry-first Dynamic Inertia Mechanism™, the S1 delivers authentic momentum transfer and engagement physics — providing the real inertial kick of genuine sequential selector mechanics.

• Lifetime Warranty
• Dynamic Inertia Mechanism™ — industry first
• Dual-Stage Engagement System
• CNC Aerospace-Grade Billet Aluminium
• Color: Black

Performance

• 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

Engineering

• 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

Dynamic Inertia Mechanism™: A First in Sim Racing

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.

Dual-Stage Engagement: The Feel of a Real Dog-Box

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. Every shift feels deliberate, confident, and indistinguishable from genuine race-car mechanics.

Built for Lifelong Performance

Machined entirely from aerospace-grade billet aluminium and finished in hard black anodising, the S1 is engineered for durability under heavy use. The internal weighted system utilizes ball bearings, compression springs, and internal dampers to ensure smooth, consistent operation. This isn't a plastic housing with basic springs — it's professional-grade mechanical engineering designed for lifelong performance.

Tunable Shift Feel: Calibrated to You

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.

S1 vs. H2SQ Sequential Mode

• S1 Sequential: Rally-focused shifter with a longer shaft and a high-impact, aggressive feel
• H2SQ Sequential: Sprint-style sequential with a shorter shaft and smoother engagement
• Both use BDH's precision mechanical architecture with side mounting

Mounting & Rig Setup

• Left or right-hand universal mounting
• Side-, top-, or reverse-mountable for maximum rig flexibility
• Integrated clamp system designed for aluminium profile rigs
• Compatible with all major sim racing rig platforms
• Same mounting plate design as all BDH products