Fox Racing Shox
has made some important changes throughout their suspension lineup for 2010 by expanding some of their proven technology into other platforms. The 32 mm series of forks will be equipped with the downhill proven FIT damping cartridge
for more control and reliability, and the revered Float RP23 should become even more capable with the addition of Boost Valve technology
. Inside we'll take a closer look at both of these systems and what they mean to the rider. Put on your learning hat as there are two great videos
to watch inside!Read on...
Fox FIT RLC Cartridge Overview
For the upcoming 2010 season Fox has equipped their 32 series forks with the proven FIT damper system. Previously only available on Fox's longer travel offerings, the FIT damper is designed to offer a more consistent damping over rough terrain, as well as added adjustment range and a slightly lighter overall fork weight. While Fox's original open bath platform can still be found on certain models, the FIT damper is their premium system and will add another level of performance to the 32 mm forks.
Interested in the new 32 mm FIT equipped forks? Watch the video for more information!
2010 Fox FIT RLC damper as found in select 32 series forks
The FIT damper is a sealed cartridge, effectively separating damping and lubrication oil. The benefits of going this route are two fold: One, because the damping oil no longer does double duty as lubrication oil, service interval periods should be greatly extended. Two, the opportunity for the oil to suffer from cavitation (foaming) is reduced due to the element of air in an open system being removed from the equation. This is where the FIT bladder plays a major part, compensating for the oil displacement as the damper rod cycles through its stroke. An added benefit of using a bladder instead of a floating piston is reduced friction as one more seal is removed from the system.
FIT RLC damper body, bladder on far right
The FIT cartridge sits inside the right fork leg and is upside down when compared to some other designs. The rebound dial is now found at the bottom of the fork leg, low speed compression adjustment and lock out force are both located at the fork crown. The FIT RLC damper has a wider low speed compression range that can be dialed in to give a super active to firm platform, and anywhere in between.
Rebound adjustment dial
• FIT RLC and RL (OE only) can now be found on select 32 mm Fox forks for 2010
• RLC adjustments include rebound, low speed compression, lock out and lockout force adjustment, air pressure
• RL adjustments include rebound, lock out, and air pressure
• Total weight loss of 72g. (FIT RLC equipped fork)
Inside Fox's 32 mm fork and FIT cartridge
The 32 mm series of forks has two axle options to pick from, traditional QR dropouts and the newer 15 mm QR system. A tapered steerer is also available for the same riders who would consider the 15 mm QR lowers.
FIT RLC cartridge exploded view, note bladder at the top of the fork
Have a look at Fox's 32 F-Series fork featuring the new FIT RLC damper cartridge.
Fox Boost Valve Overview on the RP23
Fox's Boost Valve technology began life on their DH dampers and now can be found on the venerable RP23 shock for the 2010 season. Although Boost Valve is utilized through the entire stroke on the RP23 (as opposed to the last 1/3 on the RC4), one of the obvious benefits of the Boost Valve is added control at the end of the stroke. As small as the RP23 is, it is poised to become one of the most versatile shocks on the market.
Watch the video and let Nick from Fox Racing Shox explain the benefits of the Boost Valve on the RP23
Fox RP23 with Boost Valve
The Boost Valve found on Fox's RP23 does much more than just control the shock's ending stroke, it is actually in use throughout the entire stroke. The position sensitive damping of the Boost Valve system can be taken advantage of at the beginning of the stroke to gain higher pedaling efficiency on bikes that could benefit from a firmer feel without having to resort to flipping the ProPedal lever. As a rider that deplores having to fiddle with levers, I look forward to having a go on this new RP23.
Exploded view of Boost Valve equipped RP23 behind glass
• Boost Valve within the Float family can only be found on the RP23
• Position sensitive damping comes to the RP23
• RP23 adjustments include ProPedal level, ProPedal on/off, rebound, and air spring pressure
• RP23 is available in many sizes between 5.5" x 1" stroke to 8.5" x 2.5" stroke, and many sizes in between
RP23 with Boost Valve detail
Fox 32 series FIT RLC cartridge and RP23 with Boost Valve technology
More info on Fox's Boost Valve technology as used on the RP23.
Go to Foxracingshox.com
to see all Fox's suspension products!Mike "Kakah" Levy