Fox

Air Shaft Assembly 40 203mm Float NA2.1

The Fox Air Shaft Assembly 40 203mm Float NA2.1 brings precision back to your ride with factory-level performance and reliability. Designed for riders who demand the best from their Fox 40 fork, this air shaft assembly restores smooth, consistent travel and the plush feel that makes every descent more controlled and confident.

Engineered with NA2.1 air spring technology, it delivers improved small-bump sensitivity and better mid-stroke support, so your suspension tracks the trail with precision no matter how rough it gets. Whether you’re rebuilding after a hard season or fine-tuning your setup, this genuine Fox component ensures your fork performs exactly as intended—fast, smooth, and predictable.

• Compatible with Fox 40 Float NA2.1 forks (203mm travel)
• Restores original air spring performance and feel
• Improves ride quality with consistent, responsive travel
• Perfect for routine fork maintenance or performance upgrades

Keep your suspension running at its best with the Fox Air Shaft Assembly 40 203mm Float NA2.1—the key to maintaining the legendary control and confidence that define Fox downhill performance.