undercover boost

Carbonite SpyderWeb Base

undercover boost Ti

+ Bio X-Pad SL
+ 285 x 143mm
+ Ti Alloy Rail – 195g
+ Colors: Black or White

undercover boost CrMo

+ Bio X-Pad ReActiv
+ 285 x 143mm
+ Hollow CrMo Rail – 255g
+ Colors: Black or White

undercover boost

The Undercover, amp’d up for the mountain. The Undercover Boost features a shape and profile that’s sensibly designed for smooth positional shifts on and off the saddle. Utilizing a saddle base structure that integrates active suspension functions, and combined with a padding system logically applied to complement the body’s natural anatomical movements, the Boost is elevated performance comfort for any mountain application.

Carbonite SpyderWeb Base
A flexile foundation for unparalleled shock absorption.

Unique cutouts on the base designed to compress upon impact and quickly rebound for continuous shock absorption. The spring-like structure stays active throughout the ride, soaking up bumps more efficiently than foam padding alone. The SpyderWeb base, made from proprietary material formulated for high resiliency and impact resistance, is a finely tuned suspension component designed to cushion impacts in higher frequency with minimal padding.


More cushion where you want it. Less padding where you need it

The Bio-X is a padding system shaped to complement the body's natural anatomical riding positions, resulting in some areas benefiting from extra cushioning and others with less – just as it is with the human body.

Proper cushioning is essential for the perineal region, the area between our sit bones packed with sensitive tissues, nerves, and blood vessels that cannot endure pressure. Applied pressure in this fragile zone over time can reduce blood flow, cause numbness, and the possibility of nerve damage.

The areas above the rail receptacles, generally the most rigid points on the saddle, will benefit from extra cushioning. Though these are not typical seating surfaces, proper cushioning becomes indispensable should riding maneuvers shift to sitting over these points, even for brief moments.

Less padding underneath our sit bones is ideal. Covered by mostly fat and muscles, the sit bones are naturally capable of sustaining the full body weight when seated. Thick padding in this area ends up adding pressure to the perineal from excess padding pushing up against the sensitive areas when seated.

The unique sculpting of the Bio X-Pad shape adds extra cushioning in the mid-section that better insulates the sensitive areas, thinner padding underneath the sit bones to prevent excess padding from bunching up against places it shouldn't, and thicker over the rail receptacles to cushion potential impacts. pushing up against the sensitive areas when seated.

Two types of X-Pad


a closed cell EVA foam that's denser, with faster rebounding characteristics. SL foam is substantially lighter in weight.


an open cell foam that's softer, offering more conformity. ReActiv foam weighs a little more than SL and is more economical.

Performance Shape

Shaped to move

The Undercover Boost is uniquely shaped to accommodate dynamic riding styles on and off the seat. On the saddle, multi-radii padding developed to reduce concentrated pressure by matching the 3D curvature of the sit-bones in its natural seating position. Off the saddle, a dropped tail and downward sloping nose stays out of the way when positioned behind or in front of the seat, and tapered side flaps that are extended for inner thighs to grip as needed comfortably. In concert with SpyderWeb base suspension technologies and Bio X-Pad cushioning system, the Undercover Boost is elevated performance for the dynamic rider.