RockShox ZEB Ultimate 27.5" Charger 3.1 RC2 - 44mm Offset - 2025
Built for the best riders, ridden on the hardest tracks, ZEB Ultimate rules the world’s toughest enduros. Equipped with the new Charger 3.1 RC2 damper, ZEB gives riders exceptional adjustability for the right balance of comfort, control, and speed. Alongside this flagship damper, the stout 38mm chassis rides on vibration-killing ButterCups and a DebonAir+ spring. The technology you need for the fastest split times, the style you want on the start line: This is ZEB.
New Charger 3.1 Damper
RockShox updated the plumbing through the Low Speed Compression circuit to make the oil’s easy-flow path even easier, allowing more oil to flow through the LSC when the adjuster is set to Open. 68% more oil flow, to be exact. This means less compression damping, so you can hold onto traction and control to mute low-speed trail noise.
During testing, RockShox World Cup racers requested more high-speed damping for an even more supportive ride on the fastest tracks. They increased the size of the High Speed Compression pyramid (peep that cutaway for a visual), to create more damping when the HSC adjuster is closed, so you can add the exact amount of support you need.
Buttercups
Little gold-packaged rubber pucks live at the end of the damper and air spring shafts and fit into the lower leg of the fork. Similar technology is found in off-road vehicles, chainsaws, and most devices that transfer high-frequency vibrations into the hands and arms of the user. Like a rubber mount on the handle of the chainsaw, ButterCups measurably eliminate trail chatter by on average 20%. Proven by data acquisition over thousands of trail miles and confirmed by riders. Featured in all Ultimate models and upgrade-able in the full line up of new Pike, Lyrik, and ZEBs.
Debonair+ Air Spring
By focusing on refining the shape of the spring curve, RockShox created an air spring that’s more plush off-the-top, with a supremely supportive mid-stroke and improved end-stroke ramp up. They zeroed in on details to improve small bump absorption to be extremely reactive over every inch of trail and added mid-stroke support allowing the fork to sit higher in travel and utilize every millimeter of travel. The new DebonAir+ offers a supreme ride feel and consistency you can trust.
Bushing Package
RockShox's steps to innovate represent the learnings from every development project. During the latest BoXXer development, they fine-tuned their ride testing protocols and enhanced testing in their Colorado Development center. They made improvements at their factory to ensure the highest level of manufacturing quality and consistency, all to ensure riders receive high-performance products right out of the box.
The result is an all-new bushing package available on all models of ZEB, Lyrik, and Pike. RockShox developed new production specs for lower leg reaming alongside new bushing sizing requirements, resulting in the lowest possible friction for an overall improved system.
In the box
- ZEB Ultimate 29" Charger 3 RC2 - 44mm Offset
- Bolt-on fender
- 2 volume spacers
- Starnut
- Torque cap adapters
Features
- New Charger 3.1 RC2’s adjustment range is broader than Charger 3 - less compression damping in the LSC open position and additional support in the HSC closed position
- New and improved bushing package maximizes bushing overlap, reducing friction and creating the smoothest ride possible
- ButterCups block 20% of high-frequency “trail chatter” which reduces hand and arm fatigue
- DebonAir+ air spring strikes perfect balance of small bump feel, increased air volume for support, and higher overall ride height
- Maxima Plush Dynamic Suspension Lube reduces friction, lasts longer, and enhances suspension performance ride after ride
- Bolt-in torque cap adapters now included for use with standard hub end caps
- Lightweight machined and anodized crown for premium looks and durability
- Ultra-low friction SKF wiper seals provide long lasting fork performance and improve overall suspension feel
- Short fender compatibility (RockShox fender included)
Tech Specs
Travel: | 160mm, 170mm, 180mm, 190mm |
Wheel Size: | 27.5" |
Crown Offset: | 44mm |
Spring: | Air |
Axle Configuration: | 15x110mm Boost |
Disc Mount: | Post Mount 200mm |
Min. Rotor Size: | 200mm |
Max. Rotor Size: | 220mm |
Steertube Diameter: | 1.125" - 1.5" Tapered |
Intended Use: | Enduro / Freeride |
Warranty: | 2 years |
Specs subject to change without notice. Please check with manufacturer for the most up-to-date information.