Review from Pinkbike Lewis LH4 Brake System – Precision Power for Downhill & Enduro Strongest Braking Power, Lightweight Design, Unmatched Control The Lewis LH4 Brake System is built for riders who demand absolute confidence in the most aggressive terrain. Designed for Enduro and Downhill use, it combines powerful 4-piston performance, CNC machined 7075-T6 aluminum construction, and Lewis’s signature 2-in-1 lever adjustment system for reach and bite point.Whether you’re attacking steep descents or technical switchbacks, the LH4 delivers a perfect balance of raw stopping power and precise modulation. Key Features 4-Piston Power System (2×14 mm + 2×17 mm) The asymmetric piston setup ensures smooth, linear modulation in the initial stroke and progressive power at full engagement — giving you confidence and control on every descent. 7075-T6 CNC Machined Construction Each LH4 set is crafted from aerospace-grade 7075-T6 aluminum using 5-axis CNC machining for maximum stiffness and minimum weight. The result is exceptional precision and durability under extreme conditions. Patented 2-in-1 Dual Adjustment System Customize your lever feel with Lewis’s dual adjustment mechanism for both Reach and Bite Point — fine-tuning brake response to match your riding style and terrain. Ultra-Lightweight with Strong Braking Force With a total weight of just 433 g (per front and rear set, without hoses), the LH4 offers race-level performance in a lightweight package for riders who demand speed and efficiency. Braided Kevlar Oil Hose Premium braided black hoses resist expansion and heat build-up for consistent lever feel and reliable braking under prolonged use. Customization Color Options Available in multiple color finishes — black, silver, titanium, rainbow, purple and more — for a personalized and unique setup. Technical Specifications Component Specification Master Cylinder Axial Type Material 7075-T6 Aluminum Machining Process 5-Axis CNC Piston Size 4 Pistons (2×14 mm + 2×17 mm) Pad Type Metallic Fluid Type Mineral Oil Hose Type Braided Kevlar (Black) Hose Length 90 cm / 165 cm Lever Weight 98 g Caliper Weight 121.5 g Clamp Type Split Design Color Options Customizable Anodized Colors Performance Highlights Designed for Downhill & Enduro — stable stopping power on steep descents High heat resistance with consistent braking feedback Lightweight yet rigid construction for precision riders Ideal for mountain, e-MTB, and technical trail applications Smooth lever feel + predictable power delivery across all conditions Tagline Suggestion Lewis LH4 — Engineered for Downhill Power and Precision Control.