Finding a reliable 38 g CO2 cartridge can be essential for roadside bicycle maintenance, emergency inflations, life jacket re-arms, and safety gear. This guide highlights five top options, comparing their compatibility, threading, and intended use. Read on to understand how each cartridge performs in real-world scenarios, from bike tire inflation to life vest re-arming, and how to choose the right size and thread for your equipment.
Product Summary
- RedRock 38g CO2 Cartridge – 3/8-24 thread; high-capacity for bikes, inflatables, and industrial use
- BKICKI CO2 Re-Arm Kit – 38 g with 1/2” thread; compatible with Atmos 40 and Arcus 40 life jackets
- HAINEAO PFD Re-Arm Kit – 38 g CO2 cylinder with 1/2” thread; includes bobbin and storage for life jackets
- BLUESTORM Re-Arm Kit – 38 g CO2 cylinder with 1/2” thread; for Bluestorm Atmos 40 and Arcus 40
- Maximum Inflation V85000 Series Kit – 38 g CO2 cylinder with 3/8” threads; for V85000 inflators
RedRock 38g CO2 Cartridge Review

The RedRock 38g CO2 cartridge delivers a higher gas volume than smaller 16g or 33g options, making it ideal for quick inflation on the go. It uses a standard 3/8-24 threaded neck compatible with most CO2 tire inflators and inflatable life jacket mechanisms. Applications range from rapid bike tire inflation to powering inflatable life vests, ensuring a reliable charge when time matters. The cartridge is designed for common threaded inflator heads, enabling fast, field-ready performance during roadside repairs or emergency inflations. A single cartridge can power multiple high-volume inflations, reducing the need for bulky pumps in emergencies.
Key considerations include thread compatibility and the intended use scenario. The 3/8-24 thread is widely supported, but users should verify that their inflator head is compatible. For outdoor enthusiasts, this cartridge provides a compact, transportable gas source that can help restore confidence during long rides or water activities. As with all CO2 products, handling safety and proper disposal after use are essential best practices.
BKICKI 38 Gram CO2 Re-Arm Kit

The BKICKI kit provides a 38-gram CO2 cylinder with a 1/2-inch thread, designed for Atmos 40 and Arcus 40 automatic life jackets. This kit focuses on re-arming and quick deployment in PFDs, making it suitable for water sports and emergency preparedness. The 1/2-inch thread offers compatibility with specific re-arming systems, and the kit’s compact packaging supports easy storage aboard boats or vehicles. Users should confirm thread compatibility with their life jacket model before purchase to ensure a seamless re-arm process during critical moments.
When evaluating, consider whether your life jacket uses a 1/2-inch thread and if you need additional components such as bobbins or storage cases. The BKICKI offering emphasizes straightforward re-arm functionality, helping ensure you have a ready gas source when automatic or manual inflators are deployed.
HAINEAO PFD Re-Arm Kit, 38 g

The HAINEAO PFD Re-Arm Kit includes a 38-gram CO2 cylinder with a 1/2-inch thread, a yellow water-soluble bobbin for automatic activation, and a blue storage box. It’s designed for Bluestorm Atmos 40 and Arcus 40 automatic life jackets, with a stated flotation capacity of 38 g equating to 170 Newtons. This kit targets water sports enthusiasts and maritime users who require a reliable, ready-to-deploy re-arm solution. The included bobbin and storage pack are meant to streamline maintenance and reduce downtime after activation. Always verify thread size compatibility with your PFD model before purchase to ensure proper re-arming compatibility.
BLUESTORM 38 g Re-Arm Kit

BlueStorm’s 38-gram CO2 cylinder with a 1/2-inch thread is part of a re-arm kit for Atmos 40 and Arcus 40 PFDs. The kit includes a Halkey-Roberts yellow bobbin and is tied to the Leland re-arming system, indicating a focus on compatibility with specific automatic life jacket mechanisms. This option is practical for boat owners and water sports participants who rely on a dependable re-arm kit under varied conditions. Users should check that their PFD product line matches Bluestorm’s Atmos 40 or Arcus 40 models to prevent misfit and ensure reliable deployment when needed.
Maximum Inflation V85000 Kit

The Maximum Inflation kit is designed for the V85000 series inflatable life vest inflators. It includes a 38-gram CO2 cartridge with 3/8″ threads, plus a green indicator pin and a yellow bobbin/water-sensing element along with user instructions. The kit targets auto and manual pull PFD devices, providing a complete re-arming solution for the V85000 family. This option is well-suited for fleets, rental operations, or individuals who want to maintain readiness. Verification of the inflator fit and thread compatibility with the V85000 system is advised to ensure a smooth re-arm process during emergency use.
HAINEAO 38g 50cc Kit for Airbag Vests

This HAINEAO 38 g kit is marketed for airbag vests and inflatable jackets with a 1/2-inch thread. It’s positioned as a direct replacement for CO2 cylinders used in inflatable safety gear. The kit emphasizes straightforward replacement with a standard 38 g cylinder, making it suitable for riders and water sports enthusiasts who rely on airbag-style safety gear. Pros include a clear replacement path and widespread compatibility with jackets that use 1/2-inch cylinders. Users should confirm thread size and jacket compatibility prior to purchase.
Buying Guide: Key Purchase Considerations
- Thread compatibility: Common options include 3/8-24 inches and 1/2-inch threads. Verify your device’s thread size before buying to avoid incompatible fittings or leaks.
- Intended use: Different kits target bike tire inflators, life jacket re-arming, or airbag vests. Match the cartridge to your primary application to maximize utility and safety.
- OEM compatibility: Some life jackets and inflators rely on specific brands or model lines. Confirm model compatibility (Atmos 40, Arcus 40, V85000, Bluestorm) to ensure reliable operation in emergencies.
- Safety features: Look for kits that include bobbins, indicator pins, and storage cases, which aid in proper deployment and maintenance.
- Portability: For field use, choose compact, easily transportable kits that can be stored in a vehicle, boat, or backpack without adding bulk.
- Maintenance and storage: Replace spent cylinders promptly and store in a cool, dry place away from direct sunlight to preserve gas integrity.
- Regulatory and safety considerations: CO2 cartridges are pressurized containers. Follow local regulations for transport and disposal, and handle with care to prevent accidental discharge.
- Cost vs. capacity: A 38 g cartridge provides a larger charge than smaller options but compare total run-time and number of inflations per cartridge to determine value for your typical use case.
- Vendor reputation: Source from reputable manufacturers with clear compatibility documentation. This reduces the risk of counterfeit or mismatched components which could compromise safety.
In selecting a 38 g CO2 cartridge, buyers benefit from focusing on the primary use scenario—whether inflating bike tires, re-arming life jackets, or powering inflatable safety gear. Cross-check thread size, model compatibility, and included components to ensure the chosen kit meets both safety standards and field requirements. This approach supports reliable performance when emergencies or roadside repairs demand rapid, predictable gas delivery.