RockShox SIDLuxe IsoStrut Flight Attendant A1 Trek Supercaliber 2023+

The RockShox SIDLuxe IsoStrut Flight Attendant transforms suspension performance with automatic, real-time damping adjustments. Designed specifically for the 2023+ Trek Supercaliber, this 239x40 IsoStrut shock integrates seamlessly into the AXS ecosystem and uses onboard sensors and Adaptive Ride Dynamics to anticipate terrain and rider input.

With automatic Open, Pedal, and Lock modes, Flight Attendant eliminates manual guesswork and optimizes efficiency, control, and speed on every ride.

Key Features

• Designed for Trek Supercaliber 2023+

• 239x40mm IsoStrut configuration

• Flight Attendant automatic 3-position damping (Open / Pedal / Lock)

• Adaptive Ride Dynamics learns rider input over time

• 38mm strut tube for added stiffness and support

• Fully tuned compression circuit to reduce pedal bob

• Numbered rebound dial for precise adjustment

• Maxima Plush Dynamic Suspension Lube

• AXS wireless integration

• Shared SRAM AXS battery platform

• IPX7 waterproof rating

Specifications

• Model: SIDLuxe IsoStrut Flight Attendant A1

• Size: 239x40mm

• Model Designator: SR IsoStrut

• Damper Type: RL3

• Rebound Tune: R57

• Compression Tune: C25

• Pedal Tune: M5

• Lockout Force: X8

• Max Air Pressure: 325 PSI

• Suspension Travel (Rear): 80mm (frame dependent)

• AXS Enabled: Yes

• Battery Included: Not specified (confirm before listing if included)

Compatibility

• Trek Supercaliber 2023 and newer models only

• SRAM AXS ecosystem components

Not compatible with non-IsoStrut frame designs.

In the Box

• RockShox SIDLuxe IsoStrut Flight Attendant rear shock (239x40)

• AXS-enabled unit

Why It Matters

Flight Attendant automatically adjusts suspension settings based on terrain and rider behavior, improving efficiency and traction without manual input. Designed specifically for the Supercaliber platform, this IsoStrut version provides stiffness, responsiveness, and intelligent damping in one integrated system.