Fox Float X2 2021-2025: Overview

January 2026: the all-new Fox X2 was released in 2025, which allows a full retrospective on the previous model, 2021–2025, which first sold in 2020 and until now. Over five years, this model went from a star product to one widely resold, avoided, or replaced.

While other VTT suspension products have had issues (e.g., Rockshox Vivid Air, Fox Evolution), none remained on the market as long as the X2 2021–2025, selling extensively despite technical and manufacturing flaws.

Background

Initial sales of Fox X2 were strong in 2020–2021, followed by major technical issues leading to:

• Widespread removal from bikes,
• Widespread second-hand resale,
• Serial exchanges and replacements,
• Forum discussions highlighting the problems,
• Various calls for a recall,
• Workshop refusing any work on these rear shocks.

Fox eventually retired the model in 2025, launching a simpler X2 2026 that retained only the name and visual identity.

Understanding the X2

The X2 is Fox’s high-end MTB shock with a large-volume air canister, intended for All-Mountain, Enduro, or DH. Its air spring makes it easy to adjust, if your expectations are not too high.

The 2016-2020 and 2021-2025 distinguish themselves with:

• Twin-tube architecture (2016–2025) for better reactivity, performance, and reliability when mastered,
• Coil version (DHX2) sharing many parts with the X2, differing mainly in the spring type.

X2 is supposed to mean "dual piston" but other Fox shocks, like the “X,” also use dual pistons, so the name “X2” mainly reflects positioning in the lineup rather than a unique design.

Early Issues

The X2 2021 introduced VVC: Variable Volume Control to improve hydraulic performance by adjusting valve stiffness. While innovative, assembly requires new Fox tools and added steps, making service more complex.

Additional problems pointlng to design and manufacturing issues came quickly:

• Tube failures,
• Expensive service kits changing rapidly,
• Hydraulic heads developing micro-cracks,

But the main problem was cavitation due to low IFP pressure (100 PSI), forming bubbles in the oil so that compression and rebound were not working. Cavitation often occured after a few hours of riding, reducing the shock to simple spring absorption with unpredictable control, making it dangerous in aggressive riding. Increasing pressure was not an option: it was a major design issue.

Market Impact

Despite major design and manufacturing flaws, the X2 2021–2025 sold widely due to:

• Brand reputation,
• Inclusion in OEM bikes,
• Limited consumer awareness early on.

Workshops often refused service, and Fox’s attempts at fixes were only partially effective. By spring 2025, the X2 2026 replaced it with a simpler, hopefully more reliable design.

Conclusion

The X2 2021–2025 is a cautionary tale: products positionned as high end, with serious reliability and safety issues can sell if brand image and OEM adoption are strong. Riders and workshops had to navigate an unstable product for five years.

Luc / PMB