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FOX Racing Shox
34 Float 27.5 150 3Pos-Adj FIT4 Boost Fork - 2017

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Just the right amount of squish.

The 2017 FOX Racing Shox 34 Float 27.5 150 3Pos-Adj FIT4 Boost Fork brings back all the much-loved reworking of the 2016 line with the addition of Boost axle spacing and 150mm off squish for impeccable control and smooth navigation of technical terrain. As with the 2016 version, this fork's steerer, crown, uppers, lowers, and Float Air spring all shed weight compared to earlier iterations. Despite the weight loss, FOX still manages an overall increase in stiffness for a sharp, responsive ride. Lighter and stiffer always look better on paper, but you won't fully appreciate it until experience its versatility out on the trail.


The Fit4's Damper's puffed out, 10mm shaft increases oil flow to the base valve, allowing the fork to ride high for quick, controlled recovery during everything from big, square hits to successive, small impacts. The 3-position Fit4 system also takes the reins from the old CTD system, changing the names from the overly-prescriptive categories of Climb, Trail, and Descend to a graduating scale covering Firm, Medium, and Open. While this change may read like an exercise in semantics, it entails a radical realignment of the 34 Float's capabilities that addresses virtually every issue we've had with the CTD damper in the past.


Perhaps the most welcome change from earlier Fit dampers is that Fit4 migrates the adjustable sub settings from CTD's median Trail mode to the new Open setting. Open encompasses both Descend and Trail in order to take full advantage of the fork's high ride by handling most compression duties. This makes the fork that much more relevant to all-mountain situations, combining better small-bump compliance with more confident tracking through rock gardens and rough terrain. It doesn't wallow and handling stays on point.


The Medium setting migrates much deeper into the firm side of compression than the Trail setting did, so it'll suffice in most conditions that don't require use of the big-bottomed Open setting. The Firm setting remains self-explanatory: an XC lock-out for turning on the afterburners when terrain allows. It'll likely see much less use in the new system, but we still appreciate Firm while riding to the trailhead or transitioning on fire roads.


FOX's tinkering wasn't just confined to the damper, though, as the Float air spring now omits the negative coil in favor of a self-equalizing air assembly. This is similar to the air spring chamber system that made the re-worked 36 series such a success, and its omission of a steel coil is a key contributor to the overall weight loss. Finally, a new system of spacers lets you easily temper the air shock's volume for dialing the mid stroke and ramp-up.


Travel
150 mm
Stanchion Material
Kashima-coated aluminum
Lower Material
magnesium
Crown Material
aluminum
Wheel Size
27.5 in
Steer Tube Diameter
1-1/8 - 1-1/2 in tapered
Stanchion Diameter
34 mm
Spring Type
Float Air
Damper
FIT4
Adjustability
3-position adjust
Lockout
yes
Axle
15 x 110 mm Boost QR thru axle
Max Rotor Size
203 mm
Brake Compatibility
post mount
Claimed Weight
1,783 g
Recommended Use
mountain bike, trail, all-mountain
Manufacturer Warranty
1 year

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