Recommended Additional Upgrades
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S1 FL 30th Anniversary Special Edition
Get the Combo set for the ultimate brake system upgrade.
The RCB S26 Brake Caliper is a high-performance 2-piston braking system designed to provide superior stopping power and better “brake feel” compared to original equipment. As an evolution of the famous S-Series, the S26 features a refined CNC-machined body that is both lighter and more rigid than the stock cast-iron or aluminum calipers found on most 155cc Yamaha models.
This caliper is a direct bolt-on upgrade for the front of the R15, MT-15, and XSR 155, and can also be used for NMAX and Aerox models (depending on the specific bracket/disc setup).
Key Features
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2-Piston Progressive Braking: The S26 utilizes dual 26mm pistons. This design provides a more balanced pressure distribution across the brake pads, leading to a “progressive” feel—meaning you get more braking power the harder you squeeze, without the brakes feeling “wooden” or “on/off.”
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CNC Machined Aluminum Body: Forged and then CNC-finished from high-grade aluminum. This process removes excess weight while increasing the rigidity of the caliper, which prevents “caliper flex” under heavy emergency braking.
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Superior Heat Dissipation: The aluminum alloy and open-body design allow the caliper to shed heat much faster than stock units. This significantly reduces brake fade during aggressive downhill riding or track sessions.
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Included S-Series Brake Pads: Comes pre-installed with high-friction brake pads designed to work optimally with the S26’s piston pressure, offering immediate “bite” even when the brakes are cold.
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Premium Anodized Aesthetics: Available in RCB’s signature colors (Red, Gold, Blue, Silver, Black, and Anthracite). The anodized finish is highly resistant to the corrosive effects of brake fluid and road grime.
Technical Specifications
| Feature | RCB S26 Brake Caliper Details |
| Piston Size | Dual 26 mm Pistons |
| Material | CNC Machined 6061-T6 Aluminum |
| Pads Included | Yes (RCB S-Series High-Friction Pads) |
| Compatibility | R15 V3/V4/M, MT-15, XSR 155, Aerox, NMAX |
| Mounting Type | Axial Mount (Direct replacement for most models) |
Why Upgrade to the S26?
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Safety & Performance: The stock single-piston or basic dual-piston calipers on small-displacement bikes are often the first thing to struggle when you carry a passenger or ride aggressively. The S26 offers a shorter stopping distance and better control.
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Customization: It is the perfect visual centerpiece for your front end, especially when paired with RCB Teflon Braided Brake Hoses and an S1 Master Cylinder.
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Consistency: The S26 maintains a consistent lever feel even after repeated hard stops, giving you the confidence to push your bike further.
Installation Note
While this is designed as a performance replacement, always ensure that your brake disc is in good condition before installation. When fitting the S26, it is mandatory to perform a full brake fluid flush using fresh DOT 4 fluid. For the best performance, allow the new pads a “bedding-in” period of approximately 50–100km of moderate braking.
