20x110mm "Boost" Thru Axle requires specific boost hub. NOT compatible with standard 20x110mm Thru Axle hubs. The definitive DH race fork in limited edition 50th Anniversary podium gold finish Each will come with a numbered certificate of authenticity featuring Bob Fox’s signature, plus matching gold rear shock decal sheet for all current shock models.

Target locked on the top step of the podium, developed in the crucible of World Cup competition, the 40 is the definitive DH race fork. With the new X2 damper the Fox 40 is the downhill racer's edge

• New GRIP X2 Damper - GRIP X2 is the most tunable, supportive and smoothest descent-focused damper ever created by FOX. Riders reap the benefits of sitting higher in the travel while tires stay glued to the ground, cornering with increased traction. It gives you the confidence to push the limits of downhill and enduro racing, all while reducing overall rider fatigue. GRIP X2 is the winning difference
  
  
• Lower Leg Bleeders and Bypass Channels - Bleeders allow atmospheric pressure equalization at the push of a button. Lower leg bypass channels increase volume to alleviate pressure ramping as the fork moves through its travel. Both result in better fork performance by increasing small bump sensitivity and responsiveness
  
  
• Lower Leg Arch - The lower leg design of the 40 while maximizes strength and steering stiffness for downhill performance while adding no unnecessary weight
  
  
• Floating Axles - The 40’s floating thru axle allows perfect chassis alignment and reduces unwanted friction between the upper and lower fork legs, providing much smoother suspension movement throughout the entire range of travel
  

SPECIFICATIONS

• Factory Series models feature Genuine Kashima Coat
  
• Wheel Size: 29"
  
• Travel: 203mm
  
• Air Spring: FLOAT EVOL
  
• Damper: GRIP X2 - HSC/LSC, HSR/LSR
  
• Axle/Spacing: 20x110mm "Boost" Thru Axle (NOT compatible with standard 20x110mm thru axle hubs)
  
• Disc Mount: 74mm Post Mount, 203mm direct mount (Up to 230 compatible)
  
• Upper Tube Finish: Kashima Coat
  
• Adjustments: high speed compression, low speed compression, high speed rebound, low speed rebound, and adjustable air spring pressure
  
• Rake: 52mm
  
• Steerer: 1 1/8" Straight
  
• Mud Guard Mount: Optional FOX 40 Mud Guard with sturdy 4-point direct-mount attachment
  
• Weight: 2,745g.