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Experience Unmatched Control and Performance with the RockShox BoXXer Ultimate D2 Suspension Fork - the Ultimate Choice for Downhill and Enduro Riders
Built Specifically for Demanding Mountain Trails, the RockShox BoXXer Ultimate D2 29" Suspension Fork combines race-proven engineering, innovative materials, and cutting-edge technology to elevate your riding experience. Perfect for aggressive downhill, enduro, and e-mountain biking, this high-performance fork delivers exceptional durability, precise adjustability, and superior ride quality.
Materials & Construction:
- Heavy-duty aluminum crown and steerer tube provide strength and rigidity, optimized for high-impact riding
- Magnesium lower tubes reduce weight without sacrificing durability
- Aluminum stanchions with 38mm diameter ensure maximum stiffness and precise steering response
- Black gloss finishes offer a sleek, aggressive aesthetic suitable for modern mountain bikes
Performance & Engineering:
- Linear XL air spring offers coil-like sensitivity, providing a consistent and predictable ride feel-supplies supple off the top, supportive mid-stroke, and confident bottom-out protection with a jounce bumper
- ButterWagonTech lubrication system maintains a constant oil supply to bushings, minimizing friction and extending service intervals for long-lasting smooth performance
- Charger 3.2 damping with ButterCups technology reduces high-frequency trail chatter by up to 20%, diminishing hand and arm fatigue for increased control on rough terrains
- External Low-Speed and High-Speed Compression, plus Rebound adjustments, enable fine-tuned damping settings tailored to your riding style
Components & Technology:
- 29" wheel compatibility with Boost 20x110mm axle spacing ensures optimal stiffness and clearance
- Designed for wheel widths up to 81mm and tire sizes compatible with 220mm rotors
- Crown race diameter of 30mm and a 52mm offset provide ideal trail handling and stability
- Capable of handling e-bike specifications, making it a versatile choice for all-mountain e-riders
- External air pressure and Bottomless Tokens adjustments offer customizable spring rate tuning
Style & Use Case:
- The aggressive Black gloss finish complements any downhill or enduro build
- Equipped with a bolt-on fender mount (sold separately) for added trail protection
- Ideal for downhill racing, enduro riding, and e-MTB applications where control, durability, and performance are critical
Innovative & Differentiating Features:
- Exclusive ButterWagonTech lubrication system for consistently smooth fork operation
- ButterCups technology effectively reduces trail chatter, enhancing rider comfort and control
- Rebound and compression tuning with intuitive external controls for quick adjustment on the fly
- Built-in coil-like LinearXL air spring for reliable, plush compliance across varied terrain
Upgrade your mountain biking setup with the RockShox BoXXer Ultimate D2 Suspension Fork-engineered for riders who demand the highest level of control, durability, and performance. Whether tackling rugged downhill descents or technical enduro routes, this fork ensures you stay focused and confident at every turn.
Key Specifications:
- Travel: 200mm
- Wheel Size: 29"
- Axle Compatibility: 20mm Thru x 110mm Boost TA
- Steerer Tube: 1-1/8" aluminum, 268mm length
- Brake Mount: Post Mount 200mm
- Stanchion Diameter: 38mm
- Dropout Compatibility: 15x110mm Boost
- Color: Gloss Black
Maximize your riding potential with the RockShox BoXXer Ultimate D2-designed to dominate the most challenging trails with precision and reliability.
| Item Specifications | |
|---|---|
| Steerer Type | Straight |
| Lockout Switch | Crown |
| Brake Type | Post Mount 200 |
| Negative Spring | Air |
| Travel (mm) | 200 |
| Offset | 52 |
| Axle to Crown Length | 605 |
| Front Axle | 20mm Thru x 110mm |
| Maximum Tire Width | 81 |
| S.H.I.S. Stem Clamp Diameter | 28.6 |
| Color | Gloss Black |
| Crown Race | 30 |
| Wheel Size | 29" |
| External Adjustments | High Speed Compression Damping |
| External Adjustments | Low Speed Compression Damping |
| External Adjustments | Rebound Damping |
| Defined Color | Black |
| Positive Spring | Air |
| Stanchion Diameter | 38 |
| Steerer Tube Length (mm) | 268 |
| Brake Caliper Type | Disc |
| Damping | Charger 3.2 w/ ButterCups |
| Damping Adjustments | Extl begin stroke rebnd, low speed comp, high speed comp |
| Crown Material | Aluminum |
| Offset (mm) | 52mm |
| Rotor Size (Fork) | 220mm |
| Tire Width | 81mm |
| Defined Color | Black |
| External Adjustments | Air pressure, Bottomless tokens |
| Positive Spring | Linear XL W/ButterCup |
| eBay Steerer Tube Diameter | 1-1/8'' |
| Steerer Tube Material | Aluminum |
| Lower Tubes Material | Magnesium |
| Stanchions Material | Aluminum |
| Travel (mm) | 200mm |
| Wheel Size | 29'' |
| Stanchion Diameter | 38mm |
| Rear Axle Spacing | 20x110mm Boost TA |
| Designed for ebike | Yes |
| Travel | 200mm |
| Wheel Size | 29" |
| Steerer (Stem/Race) | Straight (28.6/30mm) |
| Color | Black |
| Model Name | BoXXer Ultimate D2 |
| Spring Type | Linear XL |
| Brake Mount | Disc Only (PM-200) |
| Weight | - |
| Offset | 52mm |
| Dropout | 15x110mm Boost |
365 Cycles delivers all your cycling needs fast! We don't waste time preparing your order. Our priority is to serve our customers first and foremost. If you need help picking the right product, have questions about bike component compatibility, or just want to geek out about bikes we are here 7 days a week! Simply put, we are bike experts from dirt to tarmac and want to make sure you get the full 365 Cycles experience when you shop with us.
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365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.
Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.
Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.
If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!
If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.