Description
Upgrade your Fox 34 suspension with the Diaz Suspension Design Runt Cartridge Fox – 34 2022+ 130mm/2021-140mm, engineered for optimal performance, adjustability, and durability. This innovative dual chamber air spring cartridge is designed to deliver a smooth, coil-like ride with near-linear compression characteristics, enhancing your mountain biking experience on demanding trails and technical descents.
Materials & Engineering:
Constructed from high-quality, lightweight materials, the Runt Cartridge weighs just pound more than traditional token or spacer conversions, ensuring minimal weight penalty without compromising strength or reliability. Its patent-pending dual chamber design utilizes advanced engineering to replicate the feel of a coil spring, providing increased mid-stroke support and suppleness for superior control.
Performance & Components:
Featuring a secondary air chamber and integrated valve, this cartridge allows for precise tuning of progression and bottom-out resistance. Whether you prefer a plush ride or firm support during aggressive riding, the Runt Cartridge offers infinite adjustability to customize your fork’s feel to your riding style. The near-linear compression curve ensures a predictable, consistent ride, enhancing traction and confidence through technical sections.
Compatibility & Installation:
Designed for direct drop-in installation, the Diaz Runt Cartridge maintains full compatibility with Fox 34 forks from 2022 onward (130mm travel) and 2021 (140mm). It is specifically compatible with Fox 36 2018+ models equipped with the NA2 air spring and Marzocchi Z1 Bomber Air forks. Please note, it is not compatible with NA1 air spring, Z1 Coil forks, or Fox 36 E-Bike forks. This cartridge preserves your fork’s original air spring performance while providing an aftermarket upgrade for superior adjustability.
Style & Use Case:
Ideal for enduro, trail, and aggressive mountain biking, the Runt Cartridge is perfect for riders seeking a high-performance upgrade that offers coil-like feel, enhanced control, and adjustable progression. Its sleek design and advanced technology make it a must-have upgrade for dedicated riders looking to optimize their fork’s responsiveness and reliability.
Key Features:
– Dual chamber air spring with patent-pending design for coil-like feel
– Near-linear compression curve for consistent ride quality
– Built-in tunable progression and bottom-out resistance
– Lightweight construction ( lb heavier than token spacers)
– Easy drop-in installation for Fox 34 2022+ and 2021-140mm forks
– Compatibility with Fox 36 2018+ NA2 air spring and Marzocchi Z1 Bomber Air forks
– Maintains original air spring performance and adjustability
Elevate your mountain bike’s suspension with the Diaz Suspension Design Runt Cartridge Fox – the perfect upgrade for riders demanding precision, performance, and a smoother ride on every trail.
- Enhance your Fox 34 suspension with the Diaz Suspension Design Runt Cartridge, featuring a patent-pending dual chamber air spring that delivers a near-linear compression curve for a plush, coil-like ride feel and exceptional control.
- Constructed with lightweight, durable materials, this cartridge weighs just 1/2 pound less than coil conversions and offers a seamless plug-and-play installation, compatible with 2022+ Fox 34 and 2021-140mm forks for quick upgrades.
- Innovative engineering includes built-in tunable progression and bottom-out resistance via a secondary air chamber and valve, allowing riders to fine-tune support and prevent harsh bottom-outs on aggressive descents.
- Featuring advanced components and technology, the Runt Cartridge maintains your fork’s air spring compatibility and fits the 36mm chassis on Fox 36 (NA2 air spring) and Marzocchi Z1 Bomber forks, ensuring versatile performance across popular trail and enduro setups.
- Designed for style and use-case versatility, this cartridge offers increased mid-stroke support, infinite adjustability, and coil-like suppleness, making it the perfect upgrade for riders seeking precision, performance, and an improved riding experience on demanding terrains.
| Model Name | Runt RU34-08 |
| Compatibility | Fox 34 2022+130 (M Z2 140mm), 2021-140mm |






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