The RockShox ZEB Ultimate is built for the most extreme terrain, from steep double-black descents to full freeride lines and aggressive enduro riding. Designed around a proven 38 mm chassis, it combines the latest Charger 3.2 RC2 damper with the new LinearXL air spring to deliver unmatched control, consistency, and composure when pushing limits.

The Charger 3.2 RC2 damper features independent high- and low-speed compression adjustment with updated compression and rebound tunes matched to the LinearXL spring. The revised system delivers a quieter, more controlled ride feel with improved mid-stroke support and reduced harshness, while the numbered adjuster layout makes setup simple and repeatable.

The LinearXL air spring provides a coil-like ride character, offering supple small-bump sensitivity, strong mid-stroke support, and controlled end-stroke progression with Adjustable Bottom Out. ButterWagonTech ensures a constant oil supply to the bushings, reducing friction and maintaining smooth performance across the full service interval. Combined with ButterCups technology, which reduces high-frequency trail vibration, the ZEB Ultimate delivers a planted and fatigue-reducing ride feel.

Features

• Charger 3.2 RC2 damper with independent HSC, LSC, and rebound adjustment

• LinearXL air spring with Adjustable Bottom Out for controlled end-stroke

• ButterWagonTech for reduced friction and consistent lubrication

• Integrated ButterCups reduce vibration and trail chatter

• Numbered compression adjuster for intuitive setup

• Low-friction SKF wiper seals and Maxima 920 oil for smoother performance

• Integrated bolt-on short fender included

Specifications

• Wheel size: 27.5" or 29"

• Travel: 150 / 160 / 170 / 180 mm

• Offset: 38 mm (27.5"), 44 mm (27.5" and 29")

• Damper: Charger 3.2 RC2 with ButterCups

• Spring: LinearXL air spring with ABO

• Adjustments: High-speed compression, low-speed compression, rebound

• Axle: 15 × 110 mm Boost

• Stanchion diameter: 38 mm

• Steerer: Tapered (1.5" or 1.8")

• Brake mount: Post mount 200 mm

• Max rotor size: 220 mm

• Fender compatibility: Integrated bolt-on short fender (included)

• Weight: Approx. 2550 g (29", 170 mm travel, uncut steerer)

Compatibility

Fits modern enduro, freeride, and downhill-capable frames with Boost front hubs and tapered head tubes. Available in both 27.5" and 29" configurations. Ensure correct travel, offset, and steerer type are selected to suit your frame and riding style.

Installation Notes

Professional installation recommended unless experienced. Ensure proper steerer tube cutting, crown race installation, and correct torque settings on all hardware. Set sag and adjust air pressure, tokens, and damping to suit rider weight and terrain. Recheck headset preload and axle torque after initial ride.