RockShox ZEB Ultimate 29" Suspension Fork B1

The RockShox ZEB Ultimate 29" Suspension Fork B1 is RockShox's enduro and gravity fork, built for steep, technical descents and the impact loads that come with freeride-style terrain, with travel adjustable between 150mm and 180mm and a 44mm offset on 29" wheels. It runs the LinearXL air spring, tuned for a coil-like feel that stays supple off the top and supportive through the mid-stroke, backed by externally Adjustable Bottom Out (ABO) so you can dial in end-stroke support without a fork rebuild. ButterWagonTech, exclusive to the Ultimate-level forks, keeps a constant supply of oil moving to the bushings, which RockShox says reduces friction and keeps the fork running smooth for the full length of the service interval rather than degrading toward the next teardown.

Damping runs through the Charger 3.2 RC2 damper with independent high- and low-speed compression adjustment via a numbered control bezel that starts at zero, making setup easier to dial in and communicate to a shop or riding partner. ButterCups at the crown and lower legs block up to 20% of high-frequency trail chatter, according to RockShox, easing hand and arm fatigue on long, rough descents, while low-grab SKF wiper seals keep the fork running smoothly between services. The chassis uses 38mm aluminum upper tubes and a 15x110mm Boost thru-axle, clears tires up to 74.5mm wide, runs rotors from 200mm to 220mm, and includes a short integrated fender. It's built for riders pointed downhill on demanding trails who need a fork that holds its composure at speed, available in Electric Red or Gloss Black.