Recommended Additional Upgrades
01
S1 FL 30th Anniversary Special Edition
Get the Combo set for the ultimate brake system upgrade.
The RCB Angled Air Valve Stems (8mm & 10mm) are a functional and premium upgrade for tubeless motorcycle wheels. Designed to replace standard straight rubber valve stems, these CNC-machined aluminum valves feature an angled bend that points outward toward the side of the wheel.
This simple design shift makes checking tire pressure and inflating tires significantly easier, especially on motorcycles with large brake discs, low-clearance hubs, or bulky sprocket carriers.
Key Features
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Premium CNC-Machined Aluminum: Unlike stock rubber stems that dry out, crack, and leak over time, RCB stems are precision-machined from lightweight, high-tensile alloy. They are built to last the lifetime of your rims.
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10mm Universal Fitment: Designed for wheels with a standard 10mm (specifically 9.7mm to 10mm) valve stem hole profile. This is the standard sizing used by almost all major motorcycle manufacturers, including Yamaha, Suzuki, Honda, and TVS.
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Effortless Air Inflation: By angling the valve stem toward the outside of the rim, it eliminates the struggle of wedging rigid gas station air chucks or portable tire inflators between your brake discs and wheel spokes.
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Leak-Proof Secure Bolt-On Design: Features a robust inner locking nut and a high-elasticity rubber sealing gasket. Once tightened down, it creates a permanent airtight seal that resists loosening from high-speed centrifugal forces.
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Enhanced Safety at High RPMs: Straight rubber valves can bend outward under intense centrifugal force at high highway speeds, leading to gradual pressure loss. RCB’s rigid aluminum construction remains perfectly stationary, ensuring stable tire pressure.
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Anodized Aesthetic Finish: Finished with a corrosion-resistant anodized layer, available in a variety of premium colors (such as Red, Blue, Gold, Black, and Silver) to add a subtle custom look to your wheels.
Technical Specifications
| Feature | RCB Angled Valve Stems Details |
| Rim Hole Diameter | 10mm (Universal fit for Japanese/Asian motorcycles) |
| Material | CNC-Machined High-Grade Aluminum Alloy |
| Structure | Rigid Bolt-on with inner locking nut & rubber washer |
| Angle Orientation | Ergonomic Angled Bend ($90^\circ$ or $74^\circ$) |
| Compatibility | Tubeless Wheels Only |
| Quantity | Pack of 2 (For Front & Rear Wheels) |
Why Upgrade to RCB Angled Stems?
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No More Dirty Hands & Bent Valve Stems: If you ride a bike with large dual front brake rotors, checking tire pressure is notoriously frustrating. This angled profile brings the valve right to your fingertips.
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A Safety Essential: Checking your tire pressure regularly is crucial for optimal grip and braking performance. By making the process convenient, you are far less likely to neglect your pre-ride pressure checks.
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Durability: Rubber valve stems should ideally be replaced with every single tire change because they degrade. Switching to RCB’s aluminum bolt-on valves means you buy them once and never have to replace them again.
Installation Note
Because these are secure bolt-on valves that mount from the inside out, they must be installed while the tire is completely unseated or removed from the rim. The ideal time to install your RCB angled stems is during your next scheduled tire change or routine wheel maintenance.
