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Lyrik E1 Ultimate Flight Attendant 29in Boost Fork
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Every trail adjustment happens automatically with the Lyrik E1 Ultimate Flight Attendant 29in Boost Fork
What Our Gearhead® Experts Are Saying:
"I have ridden a lot of forks and nothing quite prepares you for the first time Flight Attendant opens up mid-climb and firms up mid-descent without you touching a single control. The Lyrik E1 Ultimate Flight Attendant 29in Boost Fork reads terrain and rider input together, and the transitions are seamless to the point where you stop thinking about suspension entirely and just ride. Combine that with the LinearXL spring and ButterCups damping, and this is genuinely the most complete trail fork I have ever put on a bike."
The best gear gets out of the way and lets you focus on the ride, and the RockShox Lyrik E1 Ultimate Flight Attendant 29in Boost Fork takes that principle further than any trail fork before it. Flight Attendant, RockShox's fully automatic wireless suspension system, reads terrain input and rider effort simultaneously and adapts the fork's behavior in real time without requiring any manual input. The climbs feel efficient, the descents feel open and capable, and the transitions between the two happen before most riders would have reached for a lockout lever.
The foundation underneath that automation is the same LinearXL air spring with Adjustable Bottom Out that defines the E1 generation of the Lyrik, delivering coil-like ride quality with genuine tunability at end-stroke. The Flight Attendant Charger 3.2 damper brings ButterCups technology to block 20 percent of high-frequency trail chatter, reducing hand and arm fatigue over the kind of long days where that accumulation starts to matter. ButterWagonTech, exclusive to the Ultimate tier, keeps a continuous supply of oil flowing to the upper tube bushings throughout the full service interval, maintaining the fork's performance consistency from the first ride of the season to the last. The result is a fork that gets smarter the more you ride it, personalizing its behavior to your preferences, your terrain, and your effort level in a way that no manually adjusted fork can replicate.
Details
- Trail fork with fully automatic Flight Attendant wireless suspension system
- Flight Attendant adapts in real time to terrain effort and rider preference
- LinearXL air spring with Adjustable Bottom Out delivers tunable coil-like feel
- Charger 3.2 Flight Attendant damper with ButterCups blocks 20% of trail chatter
- ButterWagonTech continuously oils bushings for consistent performance all season
- AXS enabled and fully wireless for seamless cockpit integration
- E-Bike approved and available in 140 through 170mm travel options
- Includes Lyrik integrated fender and comes in two signature colorways
- Item #RSXB0DA
- Travel
- 160mm
- Stanchion Material
- tapered wall aluminum
- Wheel Size
- 29in
- Steer Tube Diameter
- 1.5" tapered
- Stanchion Diameter
- 35mm
- Rake
- 44mm
- Spring Type
- LinearXL air with ButterCup (air)
- Damper
- Charger 3.2 Flight Attendant with ButterCups
- Adjustability
- externally adjustable bottom out, rebound, air pressure
- Axle
- 15x110mm Boost
- Brake Compatibility
- post mount
- Rotor Compatibility
- 180mm to 220mm
- Compatible Components
- SRAM AXS, Flight Attendant ecosystem
- Includes
- Lyrik integrated fender
- Claimed Weight
- 5lb 2.54oz (2340g)
- Manufacturer Warranty
- 2 years
- Activity
- trail, enduro, e-MTB
- Manufacturer Part Number
- 00.4021.272.001, 00.4021.272.000
Lyrik Series
Any Trail. Any Time.
Jack of all trades, master of confidence.
The Essentials Of Versatility
Stay Composed
Lyrik’s balanced chassis delivers in both directions, keeping riders fresh and in control.
Enable The Air Spring
LinearXL is a whole fork approach to air spring design, delivering predictable position-sensitive control.
The Perfect Setup Is Personal
The all-new Lyrik features adjusters that visibly indicate settings and make fine-tuning simple and intuitive.
Put A Lyrik On It
Versatility Is Predictability
LinearXL provides a position-sensitive linear curve. That means as you move through the travel, the rate at which the fork increases force never changes—delivering predictability.
Independent Bottom Out Control
Adjustable Bottom Out (ABO) lets you dial in exactly how much bottom-out support you want, while keeping the rest of the stroke consistent and predictable.
Linear XL AirAnnex
The AirAnnex on Lyrik’s lower leg increases the lower leg air volume, which reduces the air-spring progressivity and speed-sensitivity inherent to traditional lower leg designs.
Stanchions That Breathe
Strategically placed breather holes in the stanchions allow for the lower leg air volume to increase as the fork goes through its travel.
Charger 3.2: Speed Sensitive & Silent
Re-tuned for the unique position-sensitivity of LinearXL, Charger 3.2 delivers speed-sensitive control with fully independent High Speed and Low Speed Compression damping.
Exactly The Sweet Spot
DH-Level Stiffness
TorqueCap dropouts give Lyrik torsional stiffness on par with a 20mm downhill axle. All from a standard, lightweight 15mm Maxle. For an improvement in precision and steering response riders absolutely feel.
A Chassis For Serious Versatility
Lightweight without forgetting its long-travel roots, designed to make easy work of the whole mountain. Lyrik’s chassis features a fully re-engineered, buttressed lower leg built to handle every hit, at a weight that’s not a chore to pedal.
ButterWagonTech
ButterWagonTech is a proprietary matrix of divots on Lyrik stanchions that works to carry (or ‘wagon’) fresh layers of our exclusive, high-density Maxima oil to the bushings with every millimeter of travel. Unparalleled in design and function, ButterWagonTech sets a new benchmark for sensitivity.
ButterCups Vibration Reduction
ButterCups effectively isolate the air spring and damper shafts from chatter, cutting high-frequency vibration by up to 20%. Riders feel the difference, whether striving for a PR or tackling an all-day epic. Less arm pump. Less hand fatigue. More fun all day.
Exclusive Seals for Sensitivity
Most wiper seals deflect into the upper tube when the lower leg pressurizes, creating more friction. To solve for this, we worked with SKF to develop an exclusive design that cleans the dirt without grabbing the upper tube, increasing sensitivity deep in the travel.
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RockShox: Built for Bigger Hits
RockShox pioneered mountain bike suspension and keeps pushing it forward, building forks, shocks, and droppers that stay composed in the big hits and keep riders faster, more supported, and in control when the trail turns fast and rough.