Diaz Suspension Design

Runt Cartridge Fox - 34 2022+ 130mm/2021-140mm

The Diaz Suspension Design Runt Cartridge transforms the way your Fox 34 fork rides—delivering that coveted coil-like feel without sacrificing the tunability and weight advantages of air. By replacing your stock air spring with this dual-chamber design, you get a more linear compression curve, improved mid-stroke support, and tunable bottom-out control—all in a simple drop-in upgrade. Riders chasing more traction, comfort, and control on technical terrain will immediately feel the difference.

• Coil-like performance with air spring adjustability for a smooth, controlled ride
• Dual-chamber design provides tunable progression and bottom-out resistance
• Lightweight advantage: about half a pound lighter than coil conversions
• Easy installation—drop-in fit for Fox 34 forks (2022+ 130mm / 2021–140mm)
• Maintains full compatibility with your existing air spring setup

The Runt Cartridge is engineered for riders who demand more from their suspension. Whether charging through rock gardens or flowing through singletrack, it gives your front end the support and sensitivity you’ve been chasing—all with the simple adjustability of a standard shock pump.