Born from racing, the all-new RockShox BoXXer Ultimate (FS-BXR-ULT-D2) is a dual-crown gravity fork built around one promise: composure. Every design decision, from the chassis to the damper, is aimed at eliminating chaos before it reaches the rider, so each run delivers the same predictable speed, traction, and control. The new LinearXL air spring provides a coil-like ride quality, supple off the top, supportive through the mid-stroke, and backed by a jounce bottom-out bumper for confident, controlled end-stroke performance. Exclusive to the Ultimate tier, ButterWagonTech continuously supplies oil to the bushings throughout the entire service interval, dramatically reducing friction and maintaining smooth, consistent performance run after run. Rounding it all out, the Charger 3.2 damper with ButterCups and intuitive HSC/LSC controls makes dialling in your setup fast and straightforward.
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Features:
- NEW LinearXL air spring delivers a consistent and predictable ride feel backed by a jounce bottom-out bumper for 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 damper with new Rebound/Compression tunes that match LinearXL air spring, achieves virtually silent performance, keeping riders focused on the trail
- NEW Control bezel with numbered Compression adjuster for intuitive adjustmentsāstart at "0" and easily add or decrease damping
- NEW Graphics packageāminimalist design, maximum impact
- ButterCups technology block 20% of high-frequency ātrail chatterā to reduce hand and arm fatigue
- Low-grab SKF wiper seals deliver long-lasting fork performance and a smoother ride
- Maxima 920 blended 15w reduces overall fork friction
- Bolt-on fender compatibility with front and rear coverage (BoXXer Bolt-On Fender sold separately)
- Available in Electric Red or Ultimate High Gloss Black Signature colorways
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Specifications:
| WHEEL SIZE | 27.5" |
|---|---|
| TRAVEL | 200mm |
| DAMPER TYPE | Charger 3.2 RC2 W/ButterCups |
| FORK OFFSET | 44mm, 48mm |
| COLOR | Electric Red - Gloss, Gloss Black |
| E-BIKE APPROVED | E-bike Approved |
| STEERER | 1-1/8" Aluminum |
| AXLE | 20x110mm BOOSTā¢ |
| UPPER TUBE TYPE | 38mm Aluminum |
| DAMPER ADJUST | Crown |
| VOLUME REDUCER | 0/6 Tokens, 1/6 Tokens |
| SPRING | LinearXL W/ButterCups |
| MAX TIRE WIDTH | 81mm |
| MAXIMUM ROTOR SIZE | 220mm |
| MINIMUM ROTOR SIZE | 200mm |
| FENDER COMPATIBILITY | Bolt On - Short (Use AC-FEN-BXR-A1) |
| COMPRESSION TUNE | C5 |
| REBOUND TUNE | R55 |