Silca Hiro' Side Lever Locking Disc Chuck - plated V2

The Silca Hiro Side Lever Locking Disc Chuck V2 is a premium, precision‑machined locking pump chuck designed to give cyclists a rock‑solid, leak‑free connection to Presta valve stems — especially helpful when inflating tires on deep rims or disc wheels where access and space are limited.

Unlike standard pump heads that can slip or leak under pressure, the Hiro chuck uses a side lever cam‑locking mechanism that clamps firmly onto the valve and holds securely even at high pressures. Adjustable preload on the elastomer gasket lets you fine‑tune the fit to handle short valve stems (as little as ~10 mm exposed) and compensate for gasket wear over time.

Key Features

• Full metal construction: Made from durable stainless/carbon steel for long life and shop‑grade performance.
• Side‑lever locking: Cam action locks the chuck onto the valve for a secure, leak‑resistant seal while pumping.
• Fits short valves & discs: Seals on as little as ~10 mm of exposed Presta valve — ideal for deep rims and disc wheel builds.
• Adjustable gasket pre‑load: Lets you dial in the right clamping force for different valve stems and compensate for wear.
• Threads into Schrader chucks: Compatible with most pump hoses via a Schrader threaded connection — adapters available if needed.
• Made in the USA with SILCA quality: Durable design backed by SILCA’s reputation for tool longevity.