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BoXXer Ultimate Charger 3.2 27.5in Boost Fork
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Race-proven precision defines the BoXXer Ultimate Charger 3.2 27.5in Boost Fork
What Our Gearhead® Experts Are Saying:
"This is the one for riders chasing podium-level performance. ButterWagonTech keeps it incredibly smooth through the travel, and the independent HSC/LSC controls make fine-tuning between tracks simple. It feels composed even when the course gets brutal."
When hundredths of a second matter, composure decides everything. The BoXXer Ultimate Charger 3.2 27.5in Boost Fork from RockShox is built to eliminate surprise and amplify precision on the most demanding downhill tracks.
LinearXL delivers a position-sensitive linear curve that stays predictable through every millimeter of travel, backed by a jounce bottom-out bumper for confident end-stroke control. ButterWagonTech continuously carries Maxima oil to the bushings, maintaining sensitivity deep into the run, while ButterCups reduce high-frequency vibration to keep arms fresher. The Charger 3.2 RC2 damper offers fully independent high- and low-speed compression tuning, paired with visible numbered controls for fast, repeatable setup. On a 38mm chassis optimized for race precision, this fork turns aggressive 27.5in builds into focused race machines.
Details
- Race-ready downhill suspension fork
- Optimized for 27.5in wheels with Boost spacing
- LinearXL air spring with jounce bottom-out
- Charger 3.2 RC2 with independent HSC/LSC
- ButterWagonTech constant bushing lubrication
- ButterCups reduce high-frequency vibration
- 38mm precision downhill chassis
- Item #RSXB0D4
- Travel
- 200mm
- Stanchion Material
- aluminum
- Lower Material
- magnesium
- Crown Material
- forged 6061 T-6 aluminum
- Wheel Size
- 27.5in
- Steer Tube Diameter
- 1-1/8in
- Stanchion Diameter
- 38mm
- Axle To Crown
- 586mm
- Spring Type
- LinearXL air spring
- Damper
- Charger 2.3 RC
- Adjustability
- rebound, low-speed compression, high-speed compression
- Axle
- 20 x 110mm Boost
- Brake Compatibility
- disc
- Rotor Compatibility
- 200–220mm
- Includes
- bolt-on fender, bottom out tokens, short/tall crowns star nut, Maxle Stealth
- Claimed Weight
- 2943g
- Activity
- downhill, enduro
BoXXer Series
Totally Predictable
Predictability is fundamental. Riding BoXXer proves it.
Fundamentals Of Faster
Composure = Speed
BoXXer better isolates impact and vibration but still allows feel for bike and terrain inputs.
Simple Setup
The all-new BoXXer visibly indicates settings and makes fine-tuning easy.
Enable The Air Spring
LinearXL is a whole fork approach to air spring design, delivering predictable position-sensitive control.
Faster From The Inside Out
Stanchions That Breathe
Strategically placed breather holes in the stanchions allow for the lower leg air volume to increase as the fork goes through its travel.
Charger 3.2
Re-tuned for the unique position-sensitivity of LinearXL, Charger 3.2 delivers speed-sensitive control with fully independent High Speed and Low Speed Compression damping.
Linear XL AirAnnex
The AirAnnex on BoXXer’s lower leg increases the lower leg air volume, which reduces the air-spring progressivity and speed-sensitivity inherent to traditional lower leg designs.
Precision, Not Vibration
Our most aggressively precise 38mm chassis, optimized for race-winning speed. Precise speed, without the deflection and energy-robbing vibration typical of forks with excessively large stanchions.
ButterWagonTech
ButterWagonTech is a proprietary matrix of divots on BoXXer stanchions that works to carry (or ‘wagon’) fresh layers of our exclusive, high-density Maxima oil to the bushings with every millimeter of travel.
Predictability Is Linear
LinearXL provides a position-sensitive linear curve. That means as you move through the travel, the rate at which the fork increases force never changes, delivering predictability.
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RockShox: Built for Bigger Hits
RockShox pioneered mountain bike suspension and keeps pushing it forward, building forks, shocks, and droppers that stay composed in the big hits and keep riders faster, more supported, and in control when the trail turns fast and rough.