RCB E2 SERIES BRAKING SYSTEM
RCB S1 SERIES BRAKING SYSTEM
RCB S1 14mm Forged Radial Master Brake Pump is a pinnacle control component engineered to bring racetrack-level stopping power, anatomical precision, and micro-adjustable hydraulic leverage to the street. Unlike traditional axial master cylinders that push fluid perpendicular to the handlebar, the S1 Radial layout positions the internal piston inline with your finger’s natural pulling stroke, dramatically minimizing mechanical losses and maximizing brake modulation.
Forged under immense pressure, the master cylinder housing achieves maximum material density, completely preventing internal cylinder expansion under heavy emergency braking loads.
Key Features & Radial Engineering
Premium Forged Alloy Body: Sculpted via high-pressure aluminum forging processes rather than standard casting. This yields an exceptionally tight crystalline grain structure that handles high hydraulic pressures without flexing, resulting in an immediate, crisp initial brake bite.
True Radial Mechanical Advantage: Aligning the cylinder bore directly with the lever’s travel axis ensures that 100% of your hand pressure transfers straight into the brake fluid, removing the “mushy” feedback typical of stock OEM levers.
14mm Precision Piston Bore: Specially dimensioned at 14mm, creating an ideal balance of fluid displacement. This bore diameter is perfectly matched to actuate high-performance single-piston, dual-piston (like the RCB S3), or small 4-piston calipers without requiring excessive lever travel.
Integrated Multi-Position Dial Adjuster: Equipped with a premium click-adjust dial mechanism on the face of the lever body. This allows you to fine-tune the starting distance between the lever blade and your handlebar grip to accommodate varying hand sizes.
Aerodynamic Anti-Drag Vent Line: The outer third of the lever blade features an open cutout slot. This vent line prevents high-velocity wind pressure from forcing the lever backward and causing unexpected front brake drag at highway or track speeds.
Collapsible Breakaway Groove: Designed with a structural snap line near the outer tip of the blade. In a hard tip-over, the tip is engineered to snap off cleanly, saving the primary master cylinder body and leaving enough lever length to ride home safely.
Technical Specifications
| Feature | RCB S1 14mm Radial Master Pump Details |
| Product Line Family | S1 Performance Radial Control Series |
| Piston Bore Diameter | 14.0 mm |
| Manufacturing Method | High-Density Forged Alloy Shell |
| Fluid Feed Inlet Thread | Standard M10 x 1.25mm Thread Pitch |
| Handlebar Fitting Diameter | Standard 22.2mm (7/8″) Clamp Mount |
| Included Hardware | External Smoke-Tint Fluid Tank, Holder Bracket, Line Hose |
FAQs
Is this better than E2, E3+, or E4+?
Yes, S1 is a premium upgrade with better materials, sharper response, and improved performance.
What is the advantage of forged aluminum?
Forged aluminum is stronger, lighter, and more durable than cast alloy.
Is 14mm good for braking?
Yes, 14mm provides balanced braking performance with smooth control.
Is this suitable for daily use?
Yes, it works well for daily riding and also supports performance use.
Does it improve braking performance significantly?
Yes, it offers better modulation, sharper response, and stronger stopping power.
Do I need other upgrades?
For best performance, pair it with an RCB caliper and brake hose.
How do I verify authenticity?
Scan the authentication QR code included with the product.
