Fox

External Spool Valve Compressor Knob, Transfer

The Fox External Spool Valve Compressor Knob is the small but mighty detail that keeps your Fox Transfer or Transfer SL dropper post performing exactly as it should. Designed for riders who demand precision and reliability, this replacement knob ensures smooth, consistent post actuation and effortless fine-tuning out on the trail.

Whether you’re refreshing a well-loved post or dialing in a new setup, this is the part that keeps your dropper feeling factory fresh—because flawless function starts with the right components.

• Compatible with Fox Transfer and Transfer SL dropper posts
• Restores smooth, precise control of your dropper actuation
• Perfect for maintenance, replacement, or fine-tuning performance
• Built to Fox’s high standards for durability and reliability

Keep your dropper post working at its best with the Fox External Spool Valve Compressor Knob—because every detail matters when the trail points down.