When the RockShox ZEB launched in 2020, it made a bold statement with its oversized 38mm stanchions—mirroring downhill forks and setting a new standard for enduro suspension. Fast-forward to its 2023 iteration, and the ZEB Ultimate doubles down with cutting-edge tech that aims to challenge the reigning titans of mountain bike forks. It's not without its quirks, but for riders who push their bikes hard, this fork offers something special.
RockShox ZEB Ultimate | A Chassis Built for Abuse
In this RockShox ZEB Ultimate Review, let’s start with the chassis. The ZEB’s 38mm stanchions are its defining feature, and for good reason. Long-travel forks inherently face issues with flex, but the ZEB tackles this head-on with a structure that feels as stiff as a shot of espresso on a cold morning. This isn’t just marketing fluff—it translates to a front end that tracks true through chunky rock gardens and holds its line on steeps. Whether you're picking apart technical sections or blasting through gnarly terrain, the ZEB inspires confidence.
Charger 3 Damper: Precision Meets Independence
Central to the ZEB’s performance is the Charger 3 damper, featuring an updated Internal Floating Piston (IFP). This redesign ensures consistent damping across the fork’s travel. Unlike systems where adjustments can feel like they’re playing tug-of-war, the Charger 3 isolates high- and low-speed compression adjustments, making every tweak genuinely independent. It’s a fiddler’s dream, allowing riders to fine-tune performance without second-guessing their changes.
The damper also houses a coil spring to boost consistency further—a subtle but effective touch. And while rebound adjustment is limited to low-speed, the tactile feel of each click on the dials makes every adjustment satisfying and purposeful.
ButterCups and DebonAir+: Subtle Refinements
ButterCups are one of those features that sound gimmicky on paper but deliver when it matters. Inspired by vibration-damping systems in chainsaws, these small rubber pucks at the base of each leg absorb trail chatter, reducing hand fatigue by up to 20%. While they won’t completely transform your ride, they quietly take the edge off long descents.
Paired with the DebonAir+ air spring, the ZEB offers a ride that’s plush on small bumps and supportive through the mid-stroke. The spring’s larger negative air chamber helps keep the fork riding higher, boosting confidence on steep terrain. However, this added support comes at a cost: the fork is noticeably progressive, making it challenging to access the final 10-15mm of travel.
Set-Up: Simple Yet Specific
RockShox has nailed the usability factor with the ZEB Ultimate. The Trailhead app provides an easy starting point for settings, and the clearly marked dials make fine-tuning a breeze. High and low-speed compression adjustments are intuitive, though lighter riders may find the rebound range skewed towards heavier setups.
That said, the ZEB’s out-of-the-box tuning leans towards the burly side. Riders on the lighter end of the scale—or those craving a more linear feel—might need a retune or aftermarket tweaks like the Vorsprung Secus.
On the Trail: Direct and Composed
Once dialled in, the ZEB Ultimate shines on the trail. The fork offers a smooth, stiction-free stroke that gobbles up small bumps and stays composed through chunky sections. It’s not just the suspension that impresses, though; the stiffness of the chassis gives the bike a "point-and-shoot" quality. Aim at a line, and the ZEB keeps your front wheel planted, even when the trail fights back.
However, that same stiffness might feel a bit overkill for riders who prioritise playful, dynamic handling over raw composure. And while the ButterCups and progressive air spring minimise arm fatigue, they don’t completely erase it during marathon descents.
Price and Competition
At £1,120, the ZEB Ultimate offers solid value, especially compared to rivals like the Fox 38 Performance Elite (£1,300). It may lack high-speed rebound adjustment, but it makes up for it with innovative features like ButterCups and a well-engineered damper.
The Manitou Mezzer Pro (£1,100) provides stiff competition with its lighter weight and more adjustable air spring progression. Still, the ZEB holds its own with a bombproof chassis and standout damping quality.
Final Thoughts
The RockShox ZEB Ultimate is a fork built for riders who push their bikes—and themselves—to the limit. It thrives under aggressive riding, delivering stiffness, composure, and consistent damping. While its progressive nature and heavier setup might not suit everyone, those who value stability and support will find plenty to love.
What do you think? Is the ZEB Ultimate the fork for your riding style, or do you prefer something with a bit more playfulness? Share your thoughts in the comments below!
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