Piranha compact tyre deflation device

The Piranha is a compact, easy-to-deploy tyre deflation device from Stop Stick, supplied in the UK by Chiltern Global. Small enough to fit in a glovebox or pocket, it gives police, tactical and security teams a discreet way to stop a vehicle safely when a subject may attempt to flee.

Placed under a target tyre, the Piranha deflates the tyre in five seconds or less, bringing the vehicle to a slow, controlled stop rather than a sudden blowout. It is built for covert use where a full spike strip or larger deflation system would be impractical.

Why choose the Piranha?

The Piranha is designed for close-quarters and covert operations where speed, concealment and safety matter. Two coated quills disable self-sealing tyres without causing a blowout, while the reusable ABS plastic base and keyed, reloadable cartridge let teams reload in the field and deploy again with minimal downtime.

Key features:

• Compact 3½ inch (8.9 cm) design that fits easily in a glovebox, pocket or patrol bag
• Lightweight at just 5.2 oz (147 g) for fast, one-handed placement
• Deflates tyres in five seconds or less for a safe, controlled stop
• Two 2 inch (5.1 cm) coated quills disable self-sealing tyres without blowout
• Reusable ABS plastic base for repeated deployment
• Keyed cartridge system that ensures correct assembly every time
• Removable end caps for quick field reloading
• Ideal for covert placement under a stationary target vehicle
• Suitable for authorised professional users only

Example applications:

The Piranha is suited to covert and tactical vehicle control operations, including:

• SWAT and specialist tactical operations
• Warrant service and drug raids
• Surveillance and detective work
• Traffic stops and sobriety (DUI) checkpoints
• High-risk arrests where a subject may flee by vehicle
• Situations requiring a concealed, rapidly deployed deflation device

How the Piranha works

Each Piranha holds a single replaceable cartridge fitted with two coated quills. When a vehicle drives over the device, the quills penetrate the tyre and stay embedded, releasing air in a slow and predictable way instead of an instant blowout. After deployment, the end caps are removed, a fresh cartridge is fitted, and the base is ready for reuse.

Reloading and Hit Kits

The Piranha is designed to be reloaded rather than replaced. Hit Kits containing replacement cartridges and end caps allow teams to reset the device quickly in the field, keeping units ready for the next deployment and reducing whole-life cost.

Training

Training options are available to support safe, realistic practice without live quills. Training products mirror the size, weight and handling of the operational device, helping teams build familiarity and confidence before live deployment.

Professional use only

The Piranha is intended for authorised professional users only. Proof of professional identification will be required at the time of purchase, and all users must follow the relevant agency policies, training procedures and operational guidance.

Package options:

• Piranha - Single Unit (reusable ABS base with one loaded cartridge carrying two coated quills)
• Piranha Hit Kit (3 replacement cartridges and 1 end cap for field reloading)

• Length : 8.9 cm (3½ in)
• Weight : 147 g (5.2 oz)
• Cartridges : 1 replaceable
• Quills : 2 coated per cartridge
• Quill Length : 5.1 cm (2 in)
• Base Material : ABS plastic
• End Caps : Removable for field reloading
• Deployment : Covert placement under target tyre