RockShox ZEB Ultimate 27.5" Suspension Fork B1

The RockShox ZEB Ultimate 27.5" Suspension Fork B1 is RockShox's burliest trail fork, built for steep double-black terrain, freeride features, and anything else you'd point it at. A 38mm aluminum chassis and 1.5" tapered steerer give it the stiffness to hold a line on rough, high-speed terrain, and it's offered here in a 44mm-offset, 180mm-travel configuration — RockShox's most aggressive setup for 27.5" wheels.

The ZEB Ultimate runs the new LinearXL air spring, which trades a linear ramp-up for a coil-like feel: supple off the top, supportive through the midstroke, with Adjustable Bottom Out for tuning end-stroke resistance without cracking the fork open. The Charger 3.2 RC2 damper pairs independent high- and low-speed compression adjustment with a numbered bezel for repeatable setup, and ButterCups technology blocks roughly 20 percent of high-frequency trail chatter before it reaches your hands. ButterWagonTech, found only in RockShox's Ultimate-tier forks, keeps the bushings continuously lubricated between services.

Riding on a 15x110mm BOOST axle and rated for e-bike use, the ZEB Ultimate ships with an integrated short fender and is available in Electric Red or Gloss Black. It's built for enduro and freeride riders who need a fork that won't back down on the descents but can still pedal back up when the trail demands it.