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Nestled into the top tube of the Specialized Epic World Cup, the all-new SIDLuxe World Cup Integrated Design (WCID) is a revolutionary rear shock with independently adjustable positive and negative air chambers. SIDLuxe WCID's zero-sag design allows racers to ride on a positive-only air spring when they need pedaling efficiency, and activates travel only when the terrain gets rough. Tune the shock's spring curve with the press of a button: "gulp" a little (or a lot) of air into the negative chamber to give the rear shock a plusher, active feel for training days or rugged tracks.

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  • Lightweight XC design for Specialized Epic World Cup with 75mm of travel.
  • Independently adjustable negative air spring gives riders three settings to tailor their setup: Firm, Medium, or Active. Riders rely on positive air pressure only for that hardtail feel, or "gulp" air into the negative air spring to create a softer, terrain-gobbling experience.
  • FIRM: Sag is 0% for the firmest, snappiest feel. Requires maximum force to initiate travel due to no negative air spring. Once in the travel, it delivers the feel of a 100mm travel shock instead of the 75mm it offers.
  • MEDIUM: Set sag to 5% for balanced feel and performance. Offers more small bump sensitivity for rougher terrain and requires moderate force to initiate travel thanks to increased negative air spring.
  • ACTIVE: Set sag to 10% for the plushest setting on the roughest courses. Requires the least force to initiate travel due to maximum negative air spring pressure, making for a supple, compliant ride.
  • Tune the feel of the positive air chamber with air pressure and Bottomless Tokens.
  • Sleek, low-profile adjusters with 11 rebound positions and 4 compression positions.
  • Maxima Plush Dynamic Suspension Fluid reduces friction, lasts longer, and enhances suspension performance, ride after ride.
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Some variations of this product featured on this page are not available for purchase and are installed on bicycles as complete bikes only. See your dealer for details.



Eye to eye / Stroke 215x40
Damper Type RC4
Rebound tune R85
Compression tune C24
Lockout force n/a
Shaft Eyelet Standard
Body Eyelet Standard
E-Bike Approved n/a


Installation. Service. Compatibility. Find all the documentation needed to set up, use, and maintain your components in the SRAM Service hub.

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