Lewis EB 20-21 4 Piston Hydraulic E-Moto Disc Brake Kit

Lewis EB 20-21 4-Piston Hydraulic E Moto Brakes

Power • Precision • Control — Built for E-Moto (Surron / Talaria) Performance

The Lewis EB 20-21 represents the next evolution in high-power braking for e-MTB and lightweight e-moto platforms. Designed around a large-bore axial master cylinder and a precision-machined 7075-T6 aluminum monoblock caliper, this system combines brute stopping force with refined lever feel and exceptional thermal stability. Whether you’re managing heavy e-bike loads or pushing downhill laps at speed, the EB 20-21 delivers confident, fade-free control lap after lap.

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Engineered for E-Power Braking

The EB 20-21 system is purpose-built for electric power-assisted bikes. Its specialized tuning offers a firmer, more progressive lever feel, letting riders manage power and weight with ease. Inside, the 4-piston caliper uses a 2 × 20 mm + 2 × 21 mm asymmetrical piston layout with TITAN ceramic insulation, ensuring perfectly balanced pressure distribution, even pad wear, and consistent braking feedback during long, high-heat descents.

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Strength Meets Efficiency

Constructed from aerospace-grade 7075-T6 aluminum, every component of the EB 20-21—lever, caliper, and clamp—is precision-cut using high-tolerance CNC machining. The result: a brake that’s light, stiff, and incredibly durable.

Under heavy hydraulic pressure, the caliper exhibits minimal deformation, maintaining consistent braking torque in extreme riding conditions. Cooling fins on the caliper body further improve heat dissipation, keeping performance sharp when temperatures rise.

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Smooth Modulation and Effortless Adjustability

The EB lever features four precision cartridge bearings across its pivot points for smooth, play-free lever motion. A tool-free reach adjuster makes it easy to tailor lever distance to your preference, even mid-ride.

The split clamp design simplifies installation while increasing clamp rigidity, and the universal left/right configuration allows flexible setup across different riding styles and regional preferences.

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Built to Handle Real-World Abuse

Riders seeking vertical gain in lightweight electric motorcycle builds, the EB 20-21 system excels where others falter.

• T200 Kevlar-braided hoses and mineral oil fluid deliver a consistent feel and long service life.

• EP-44 metallic pads offer powerful bite and high heat resistance.

• Designed to pair perfectly with Lewis 2.3–3.0 mm thick rotors for optimal braking torque.

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Key Features

• 7075-T6 CNC Aluminum Construction – Lightweight, rigid, and built for heavy-duty use.

• Dual-Diameter Piston Design (20 mm + 21 mm) – Linear braking response with even pad wear.

• TITAN Ceramic Piston Insulation – Superior heat management and fade resistance.

• Cooling Fin Caliper – Enhanced temperature control for long descents.

• Axial Master Cylinder – Compact, efficient, and easy to maintain.

• Four-Bearing Lever Pivot – Ultra-smooth lever action with zero slop.

• Tool-Free Reach Adjust – Quick ergonomic customization.

• Split Clamp – Simple install with improved lever strength.

• Universal Orientation – Use on either side, front or rear.

• Mineral Oil System – Safe, low-maintenance, and long-lasting.

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Technical Specifications

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The Bottom Line

The Lewis EB 20-21 brings big-bike braking power to the e-MTB world. With a refined lever feel, dual-diameter piston design, and cooling-optimized construction, it delivers confident control where heat, weight, and torque push lesser systems to their limits.

EB 20-21 — Engineered for the power of e-performance.