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The Fox 831 was built for the rigors of dirt jumping, dual slalom, and 4X racing. Fox designed this fork to be lightweight. In order to absorb the abuse of the course, the 831 uses magnesium lower legs, just as the Float does. However, the chassis is much stiffer due to the greater bushing overlap. The damping has been upgraded for 2014 for greater control. The 831 feels stiffer than prior years. The 831 features gobs of technology including: Kashima coating, a FIT cartridge, CTD, and Trail Adjust mode.
The Kashima coating is a hard anodizing process that fills in any micro pores in the material creating a smoother surface, in comparison to a hard anodization on prior versions. Its distinctive gold color is backed by its high performance attributes including extreme durability as well as an extremely smooth feel. The whole purpose and value of the Kashima coating is its friction reduction properties.
The Fox 831 features the FIT cartridge. FIT stands for Fox Isolated Technology. FIT technology employs a bladder system that keeps the oil and air from mixing to provide optimal performance in all riding extremes. Fox tuned the 831 to have a bottle- neck feel to the 831’s suspension. The FIT damper was designed to allow maximum pedal efficiency, and is progressive to prevent bottoming out.
CTD technology is a new development for Fox. CTD is short for Climb, Trail, and Descend. It is a three position on the fly system that provides three distinct compression dampings that you’d typically need on an average ride. CTD is extremely useful on the trail. The rider is quickly able to flip the lever between the three positions, and which results in being used numerously throughout the ride. CTD is much faster than the older click system, where the rider would have to stop and click through to find the proper setting.
Climb mode has the firmest low- speed compression, which maximizes pedaling efficiency and has minimal suspension movement. Internally, the oil flow is restricted, and can only flow through the Climb port, which limits the suspension’s movement. In the event of a hard impact, the spring loaded blow- off valve will allow the damper to go into its travel. Trail mode provides an optimal blend of pedaling efficiency and control on variable terrain. The oil flow is opened to the mid and high speed compression shim stack. Descend mode is an optimized low- speed compression setting which provides the perfect balance of control and plushness for steep, aggressive descents. Oil is able to flow through the high, mid, and low speed ports. CTD is easily controlled by switching the dial on the crown of the fork. This quick and easy adjustment allows the rider to control their suspension on the fly.
This version of the 831 has Adjustable Trail mode. Once the lever is set to Trail mode, this fork allows the rider to have an extra 3 clicks of trail mode adjustability (soft, medium, and firm.) Adjustable Trail mode acts as a fine tune low speed compression adjustment. Adjustable Trail mode provides the rider with maximum suspension adjustability on the trail.
Climb, Trail, and Descend mode technology will change the way you ride. CTD makes it easier for the rider to adjust their fork to adapt to the terrain ahead.