Assos Mille GT Bib Shorts S11

The Assos Mille GT Bib Shorts S11 is Assos's core endurance bib — the model that most riders encounter first and return to consistently. It sits in the middle of the Assos lineup by price, but the engineering behind it reflects decades of refinement. The S11 generation brings a new body textile, Racing Series bib strap technology, and meaningful updates to the insert, all while reducing weight and extending leg length for a more modern, streamlined silhouette.

The body is built from QUARTZ, a lightweight warp knit that breathes well, dries quickly, and holds its color under tension — the true-black shade doesn't turn white or go transparent when the fabric stretches, which matters over thousands of washes and kilometers. Eighty percent of QUARTZ's content comes from pre-consumer recycled polyamide, and permanent odorControl is integrated into the fabric structure rather than applied as a coating. The rollBar bib straps are the standout structural upgrade in this generation — a patented bracing system adapted directly from the Racing Series that keeps the insert locked in position as your weight shifts through climbs, sprints, and corners. PILtec Plug-In grippers at the leg openings use a microdot silicone treatment on an ultrabreathable textile band to hold the shorts in place without the bulk or heat of traditional elastic bands. The zeroPressure waist construction is soft and highly elastic, with no clamping or pinching at the waistband.

The GT S11 insert runs 12mm thick and combines four distinct technologies: Shock-Absorb Damping Mono compressive foam layers provide the endurance platform foundation, 3D Waffle perforated foam adds breathability and sheds excess weight, goldenGate 2.0 free-floating construction moves with the body rather than against it with updated wing cut-outs that reduce friction through the full pedal stroke, and Sundeck Tec at the front of the insert minimizes footprint and eliminates pressure while increasing airflow beneath the foam.

Specs at a Glance

• Body fabric: QUARTZ warp knit — permanent odorControl, 80% recycled polyamide, UPF rated
• Bib straps: rollBar (Racing Series-derived, insert-stabilizing brace system)
• Leg grip: PILtec Plug-In (microdot silicone on ultrabreathable textile band)
• Waist: zeroPressure (soft, highly elastic, no pinching)
• Insert thickness: 12mm (GT S11 platform)
• Insert technologies: Shock-Absorb Damping Mono, 3D Waffle, goldenGate 2.0, Sundeck Tec
• Fit: regularFit, body-contoured with reduced seams
• Breathability: 4/5 | Quick Drying: 5/5 | Ride Intensity: 3/5
• Temperature range: > 69.8°F
• Colors: Blackseries, Burgundy Red, Moss Green, Wild Brown
• Sizes: XS–3XL

Design Benefits

1. rollBar keeps the insert where it belongs — the Racing Series-derived brace system eliminates insert migration during hard efforts, so the chamois stays centered through sprints, long climbs, and repeated position changes.
2. QUARTZ fabric holds up over time — the true-black warp knit resists color degradation and transparency under stretch, maintaining its appearance and performance through heavy use.
3. Four-layer insert covers the full comfort spectrum — the GT S11 insert combines compressive foam, perforated breathability foam, free-floating construction, and a pressure-free front panel into a 12mm platform designed specifically for endurance-paced riding.
4. No-pressure fit at every contact point — zeroPressure waist, PILtec leg grippers, and body-contoured shaping eliminate the common friction and pressure points that accumulate into discomfort on longer rides.