Silca Hiro Side-Lever Locking Presta Chuck V2 - Silver
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Merlin CyclesSilca Men's Silver Hiro Side-Lever Locking Chuck V2
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£59.00
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Product Information
Full details
The Silca Hiro Side-Lever Locking Presta Chuck V2 is designed for serious cyclists and professional mechanics who require a bombproof, high-pressure connection for Presta valves. Its standout feature is the elite-grade carbon tool steel construction and elastomer gasket that holds firm at pressures exceeding 220psi, providing unmatched security for road and track racing. While it offers unparalleled reliability, users should note that the specialized design requires a manual adjustment process for gasket tensioning to maintain its peak performance over time.
All features
| Model Part Number | SIAMPUCHUASY006 |
|---|---|
| Brand | Silca |
Extended Product Information
FAQs
Can I use this on Schrader valves?
No, the Silca Hiro V2 is designed exclusively for Presta valve systems.
What is the maximum pressure this chuck can handle?
The Hiro V2 is engineered to maintain a secure seal at pressures exceeding 220psi.
Will this work with my disc wheel?
Yes, the compact design is specifically optimized for tight clearances and short valve stems common on disc wheels.
How often should I adjust the gasket pre-load?
You only need to adjust it when you notice a decrease in seal performance or if the chuck does not grip the valve stem securely.
Does it come with a hose?
No, the Hiro V2 is a standalone chuck that attaches to your existing pump hose via a male Schrader thread.
Is the gasket replaceable?
The design features adjustable pre-load to maximize the lifespan of the elastomer, but should it eventually fail, the assembly is designed for long-term serviceability.
Troubleshooting
Chuck leaks air during pumping
Increase the gasket pre-load by adjusting the tensioner until a tighter seal is achieved on the valve stem.
Lever feels stiff or difficult to engage
Inspect the gasket for dried sealant or debris and clean the area with a damp cloth.
Pros and Cons
Pros
- Extremely secure connection that prevents blow-offs at high pressure
- Compatible with very short (10mm) valve stems
- Highly durable steel construction built for longevity
- Adjustable design extends the life of the internal gasket
Cons
- Requires manual adjustment for optimal gasket seal
- Heavier than plastic or lightweight alloy chucks
- Requires specific male Schrader-compatible hose interface
Setup, Compatibility & Care
The Hiro V2 connects to any standard pump hose equipped with a male Schrader thread. To set up, simply thread the chuck onto your existing hose until the seal is secure.
Maintenance Tips:
- Periodic Inspection: Check the gasket periodically for debris or signs of aging.
- Adjustment: If you feel the chuck slipping or notice air escaping during pumping, use the adjustable pre-load feature to increase tension on the gasket.
- Cleaning: Keep the internal chamber free of sealant residue, especially if using tubeless systems, as build-up can interfere with the gasket seal.
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