Product Description
The RockShox Deluxe Ultimate RCT is a premium rear air shock custom tuned by the Trek Suspension Lab for compatible Trek Top Fuel 29 suspension platforms.
Built around a DebonAir air spring and Ultimate-level RCT damper, this Trek-specific shock delivers supple initial travel, controlled mid-stroke support, and efficient performance across technical climbs, fast descents, and varied trail conditions.
The damper provides external rebound adjustment, adjustable compression, and a two-position Open/Firm lever. Its compact trunnion upper mount and Trek-specific lower mounting dimensions are designed to work with the suspension kinematics of compatible Top Fuel frames.
Key Features
- Genuine RockShox Deluxe Ultimate rear shock
- Custom tuned by Trek Suspension Lab
- Designed for compatible Trek Top Fuel 29 models
-
185 x 50mm eye-to-eye and stroke
- Trunnion upper mount
- DebonAir air spring
- Ultimate RCT damper
- External rebound adjustment
- Adjustable compression damping
- Two-position Open/Firm lever
- Medium rebound tune
- Medium compression tune
- Two factory-installed volume-reducer tokens
- E-bike approved
- Black body with black graphics
- Non-retail packaged
Specifications
- Brand: RockShox
- Model: Deluxe Ultimate
- Model Code: RS-DLX-ULT-B2
- Example Serial Number: 33T10611541
- Product Type: Rear Air Shock
- Intended Platform: Compatible Trek Top Fuel 29
- Eye-to-Eye Length: 185mm
- Stroke: 50mm
- Configuration: 185x50 TR
- Air Spring: DebonAir
- Damper Type: RCT
- Remote: No
- Rebound Adjustment: External
- Rebound Clicks: 10
- Compression Adjustment: Open/Firm with external compression adjustment
- Rebound Tune: Medium
- Compression Tune: Medium
- Pedal Tune: Not applicable
- Lockout Force: 380
- Volume Reducers: 2 tokens
- Check Tune: Standard
- Maximum Air Pressure: 325 PSI
- E-Bike Approved: Yes
- Shock Body Color: Black
- Decal Color: Black
- Decal Orientation: A
Mounting Dimensions
Upper Mount
- Mount Type: Trunnion
- Width: 54mm
- Hardware Diameter: 10mm
Lower Mount
- Mount Type: Standard eyelet / pin
- Width: 30mm
- Hardware Diameter: 8mm
Compatibility
Designed for compatible Trek Top Fuel 29 frames requiring:
- 185mm eye-to-eye length
- 50mm stroke
- Trunnion upper mounting
- 54mm upper mounting width
- 10mm upper hardware diameter
- 30mm lower mounting width
- 8mm lower hardware diameter
- Compatible Trek Suspension Lab tune
Some Trek references may list the eye-to-eye measurement as approximately 184mm, while RockShox identifies this shock as 185x50(TR).
Rear shocks are highly frame-specific. Matching the eye-to-eye length and stroke alone does not guarantee compatibility. Please confirm the exact bicycle model, model year, frame size, mounting dimensions, stroke, and required suspension tune before ordering.
Included
- RockShox Deluxe Ultimate RCT 185 x 50mm rear shock
- Factory-installed volume-reducer tokens
- Includes only what is pictured and described
Warranty and Notes
- Genuine Trek and RockShox replacement component
- Custom Trek Suspension Lab tune
- 33T10611541 is an example serial number for model reference only
- The serial number on the item received may differ
- Frame mounting bolts and additional hardware are included only when pictured or stated
- Professional installation and suspension setup are recommended
- Do not exceed the maximum air pressure of 325 PSI
- Manufacturer warranty eligibility is subject to applicable Trek and RockShox terms
Condition
- New
- Non-retail packaged
- Genuine RockShox and Trek OEM product
- Includes only what is pictured and described
