RockShox ZEB Ultimate Charger 3.2 B1 29" Suspension Fork
Take control of the toughest trails with the RockShox ZEB Ultimate Charger 3.2 B1 29er suspension fork. Designed for aggressive enduro riding, technical descents, freeride and electric mountain bikes, the ZEB Ultimate combines a seriously stiff 38mm chassis with RockShox's latest suspension technology.
Featuring the advanced Charger 3.2 RC2 damper, a new LinearXL air spring, ButterCups vibration absorption and Adjustable Bottom Out technology, this premium MTB fork delivers outstanding control when the terrain gets steep, rough and fast.
Whether you're upgrading your enduro MTB, building a long-travel trail bike or improving the front suspension on your e-MTB, the RockShox ZEB Ultimate offers the support, sensitivity and adjustability needed for demanding mountain bike riding.
Why Choose the RockShox ZEB Ultimate?
- Charger 3.2 RC2 damper: Independent high-speed and low-speed compression adjustments provide precise control for different terrain and riding styles.
- LinearXL air spring: Delivers a supple initial stroke, supportive mid-stroke and consistent suspension response that feels remarkably close to a coil spring.
- Adjustable Bottom Out (ABO): Externally adjustable end-stroke control helps manage heavy landings and big impacts.
- ButterCups technology: Designed to reduce high-frequency trail vibrations reaching the handlebars, helping to minimise hand and arm fatigue.
- ButterWagonTech: Maintains lubrication at the fork bushings to reduce friction and support consistent performance between services.
- 38mm chassis: Provides the stiffness and steering precision needed for aggressive enduro, freeride and high-speed descending.
- E-MTB approved: Suitable for compatible electric mountain bike applications, subject to frame, steerer and manufacturer requirements.
- Low-friction SKF seals: Help maintain a smooth suspension action while protecting the fork internals.
Charger 3.2 RC2 Damper – Precision Control
The RockShox Charger 3.2 RC2 damper is designed to deliver consistent performance over rough, demanding terrain. Updated compression and rebound tuning works with the LinearXL air spring to provide a controlled, composed ride.
Independent high-speed and low-speed compression adjustments let riders fine-tune how the fork responds to different impacts. The numbered compression adjusters make it easier to establish a baseline setting and make repeatable adjustments.
From fast, rocky enduro stages to steep technical descents and bike park trails, the Charger 3.2 damper helps keep the front wheel tracking the ground for improved control and confidence.
LinearXL Air Spring – Coil-Like Feel Without a Coil
The new RockShox LinearXL air spring is designed to provide a consistent, predictable suspension feel throughout the fork's travel.
Its supple initial movement improves sensitivity over small bumps, while supportive mid-stroke performance helps the fork maintain composure through corners, compressions and repeated impacts.
The integrated Adjustable Bottom Out system allows additional tuning of the final portion of travel, making it particularly valuable for riders tackling drops, jumps and aggressive enduro trails.
ButterCups and ButterWagonTech
RockShox ButterCups technology helps isolate high-frequency vibrations from the trail. RockShox states that ButterCups can block 20% of unwanted high-frequency trail chatter, helping reduce fatigue on longer and rougher rides.
The new ButterWagonTech lubrication system, exclusive to Ultimate models, continuously supplies oil to the fork bushings. This reduces friction and helps maintain a smooth, consistent suspension feel throughout the service interval.
RockShox ZEB Ultimate B1 29" Technical Specifications
| Brand | RockShox |
|---|---|
| Model | ZEB Ultimate B1 |
| Model ID | FS-ZEB-ULT-B1 |
| Wheel Size | 29 inch |
| Travel Options | 150mm, 160mm, 170mm, 180mm |
| Damper | Charger 3.2 RC2 with ButterCups |
| Air Spring | LinearXL with ButterCups |
| Stanchion Diameter | 38mm aluminium |
| Axle | 15 x 110mm BOOST |
| Fork Offset | 44mm |
| Steerer Options | 1.5" tapered or 1.8" tapered, depending on variant |
| Compression Adjustment | High-speed and low-speed compression |
| Bottom Out | Externally adjustable |
| Minimum Brake Rotor | 200mm |
| Maximum Brake Rotor | 220mm |
| Maximum Tyre Width | 74.5mm |
| E-Bike Compatibility | E-bike approved; check exact model |
| Weight | Approx. 2,550g (RockShox reference: 29", 170mm, 1.5" tapered configuration) |
| Integrated Mudguard | Short mudguard included |
Specifications vary by part number. Check your selected travel, steerer and colour before ordering.
Ideal for Enduro MTB and E-MTB Upgrades
The RockShox ZEB Ultimate is a premium long-travel mountain bike suspension fork designed for riders who demand control, reliability and performance on challenging terrain.
Its strong 38mm chassis makes it particularly well suited to aggressive enduro riding, freeride, bike park riding and compatible full-suspension electric mountain bikes.
Available in 150mm, 160mm, 170mm and 180mm travel configurations, the 29-inch ZEB Ultimate can suit a wide range of long-travel MTB builds where the frame manufacturer approves the selected fork dimensions.
Frequently Asked Questions
Is the RockShox ZEB Ultimate suitable for electric mountain bikes?
Yes. The RockShox ZEB Ultimate B1 is available in e-bike approved configurations. Always check the exact fork specification, steerer compatibility and your bike manufacturer's requirements before fitting.
What is the difference between the Charger 3.2 and older Charger dampers?
The Charger 3.2 features updated damping tunes designed to work with the new LinearXL air spring. It also offers intuitive, numbered compression controls for precise and repeatable suspension adjustments.
What travel options are available?
The 29-inch RockShox ZEB Ultimate B1 is available in 150mm, 160mm, 170mm and 180mm travel options. Always select a travel length approved for your mountain bike.
What is the benefit of ButterCups?
ButterCups help reduce unwanted high-frequency vibrations transmitted through the fork, improving rider comfort and reducing hand and arm fatigue when riding rough terrain.
Is the RockShox ZEB Ultimate suitable for downhill riding?
The ZEB Ultimate is designed for aggressive enduro, freeride and demanding descents. Its single-crown construction also makes it suitable for pedalling between downhill runs, unlike a dedicated dual-crown downhill racing fork.
Will the ZEB Ultimate fit my MTB?
Compatibility depends on your wheel size, headset, steerer dimensions, axle standard, brake configuration and approved fork travel. Check your bike's specifications before purchasing.
Buy RockShox ZEB Ultimate Forks at Midlands Cycles
Upgrade your mountain bike with the RockShox ZEB Ultimate Charger 3.2 B1 29er fork from Midlands Cycles.
Based in Stone, Staffordshire, Midlands Cycles specialises in mountain bikes, electric mountain bikes, components and professional bike servicing.
Whether you're upgrading your existing enduro bike or building your next dream MTB, contact our team for advice on fork compatibility, travel options and suspension setup.