UNDERCOVER stratum max

SpyderWeb Flexile Base

stratum MAX Ti

+ Bio-Pad ReActiv
+ 285 x 145mm
+ ThermoForm Cover
+ Ti – 270g

stratum MAX Hollow CrMo

+ Bio-Pad ReActiv
+ 285 x 145mm
+ ThermoForm Cover
+ Hollow CrMo – 280g

stratum MAX Steel

+ Bio-Pad ReActiv
+ 285 x 145mm
+ ThermoForm Cover
+ Steel – 325g

undercover stratum max

The EVOlution of the racing saddle. Sharing the same shape as the EVO with integrated seatpost, the EVO Pivotal’s swooping contour lines perfectly matches the fluid lines of modern BMX racing frames. At 240mm in length and just 100mm wide, the EVO is uniquely sleek and slim to ensure zero disruption under any riding motion. Custom lightweight alloy pivotal hardware accessible with special allen wrench (included) for seamless look. For those with a dedicated warm-up/cool-down saddle, the EVO pivotal is the ultimate race time saddle.

Feeling Squished Down There?

It’s likely due to your sad dle’s poor relief channel design. A proper perineum relief channel should be wide and deep enough to reduce pressure on the perineal region, thereby preventing numbness, tingling, and pain. And since the body is not linear, the shape of the channel shouldn’t be, either.

Enter the Immersion Groove, an anatomically-proper channel with voluminous proportion and space tailored to relieve pressure in this highly sensitive area. So, if you’re getting squished down there, the generous Immersion Groove is the perfect upgrade. Stop cramming and embrace the comfort of a spacious first-class seat and focus on the ride, rather than the discomfort


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.


The Bio-Pad 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.

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 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.

The unique sculpting of the Bio-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.

ReActiv Bio-Pad

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