RockShox BoXXer Ultimate

Overview

Born from racing, BoXXer promises one thing above all—composure. By eliminating chaos before it reaches the rider, every run delivers predictable speed, traction, and control. The all-new LinearXL air spring provides a coil-like ride—supple off the top, supportive through the mid-stroke, and backed by a jounce bottom-out bumper for confident end-stroke control—giving you unwavering consistency and predictability. Found only in our Ultimate forks, ButterWagonTech ensures a constant supply of oil to the bushings, reducing friction and maintaining smooth performance throughout the entire service interval. Intuitive HSC/LSC controls on the Charger 3.2 damper with ButterCups technology make setup fast, understandable, and easy to communicate.

Features

• NEW LinearXL air spring delivers a consistent and predictable coil-like ride feel—supple off the top, supportive through mid-stroke—backed by a jounce bottom-out bumper for confident end-stroke control.

• NEW ButterWagonTech ensures a constant supply of oil to the bushings, reducing friction and maintaining smooth performance throughout the entire service interval.

• NEW Charger 3.2 RC2 damper with updated Rebound/Compression tunes matched to LinearXL air spring, achieves virtually silent performance keeping riders focused on the trail.

• ButterCups block 20% of high-frequency trail chatter, significantly reducing hand and arm fatigue while increasing control and comfort.

• 38mm aluminum upper tubes and 1-1/8" aluminum steerer provide exceptional stiffness for downhill racing demands.

• 20x110mm Boost axle provides increased stiffness and improved wheel security on the most challenging tracks.

• Crown-mounted damper adjust and volume reducer (0/6 or 1/6 tokens) allow precise spring rate tuning without tools.

• Short fender compatibility with bolt-on RockShox fender for muddy conditions.

• Maximum 220mm rotor compatibility for powerful and consistent braking performance.

• Signature BoXXer Electric Red colorway or Gloss Black finish—unmistakable presence on the start line.

Real-World Performance