Description
Upgrade your mountain bike’s suspension with the Diaz Suspension Design Runt Cartridge Fox – 36 and Z1 Bomber 170mm, the original dual chamber air spring cartridge engineered for superior performance and adjustability. Crafted with high-quality materials, this innovative cartridge features a patent-pending design that delivers a near-linear compression curve, mimicking the feel of a coil spring while maintaining infinite tunability for a customized riding experience.
Designed for versatility and ease of installation, the Runt Cartridge offers a seamless drop-in replacement for Fox 36 (2018+ NA2 air spring) and Marzocchi Z1 Bomber 170mm forks. Its coil-like suppleness provides exceptional mid-stroke support and built-in tunable progression or bottom-out resistance through a secondary air chamber and valve, ensuring optimal performance across diverse terrain and riding styles.
Constructed to be lightweight-1/2 lb lighter than coil conversions and only 20 grams heavier than tokens or spacers-this cartridge preserves your fork’s air spring compatibility while enhancing durability and ride quality. Whether tackling aggressive enduro, technical trail riding, or long-distance climbs, the Diaz Runt Cartridge offers unmatched adjustability and performance.
Key Features & Benefits:
– Materials & Engineering: Precision-machined from high-grade components for durability, lightweight construction, and reliable performance.
– Performance & Technology: Dual chamber air spring with patent-pending design for a near-linear compression, coil-like feel, and customizable bottom-out support.
– Adjustability: Infinite tuning options via secondary air chamber and valve, enabling riders to dial in their optimal suspension setup.
– Compatibility: Fits 2018+ Fox 36 (NA2 air spring) and Marzocchi Z1 Bomber forks-170mm travel, easy drop-in installation.
– Style & Use Case: Designed for aggressive trail riders, enduro racers, and mountain biking enthusiasts seeking high-performance, adjustable suspension enhancements.
Note: Not compatible with NA1 air springs, Z1 Coil forks, or Fox 36 E-Bike forks. This product is sold exclusively through authorized channels; third-party listings are prohibited.
Enhance your fork’s performance with the Diaz Suspension Design Runt Cartridge – the perfect upgrade for riders demanding coil-like support with the versatility of air. Experience smooth, controlled rides on demanding terrain with increased control and reliability.
- Innovative dual chamber air spring cartridge featuring patent-pending design for a near-linear compression curve and coil-like suppleness, enhancing rider comfort and control.
- Constructed with durable, lightweight materials, the Diaz Suspension Design Runt Cartridge is only 1/2 lb lighter than coil conversions, providing increased performance without added weight, and maintains compatibility with Fox 36 (2018+) NA2 air springs and Marzocchi Z1 Bomber forks.
- Advanced engineering includes built-in tunable progression and bottom-out resistance via a secondary air chamber and valve, allowing precise adjustment for mid-stroke support and bottom-out protection tailored to your riding style.
- Designed specifically for 170mm travel Fox 36 and Z1 Bomber forks, the cartridge offers easy drop-in installation, enabling quick upgrades without fork disassembly, and maintains factory air spring compatibility for seamless integration.
- Enhance your mountain biking experience with this high-performance cartridge that combines coil-like softness, infinite adjustability, and durable construction, making it an essential upgrade for aggressive trail riding, enduro, and all-mountain disciplines.
| Model Name | Runt RU36-07 |
| Compatibility | Fox 36 and Marzocchi Z1 Bomber 170mm |






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