The Assos Mille GTO Bib Shorts S11 Black Series are premium endurance-focused cycling bib shorts built for maximum long-distance comfort, muscle support, and reduced friction during extended rides.
Standout Features
OSSIDIA Fabric
The main textile uses ultrafine elastic yarns to combine:
- Smooth next-to-skin comfort
- Light muscle compression
- Excellent stretch and body mapping
- Reduced rider fatigue on long rides
The fabric is designed to feel silky and supportive without feeling restrictive.
LOSANGA Crotch Panel
A dedicated insert in the crotch area improves:
- Ventilation
- Pressure relief
- Cooling airflow
- Comfort in aggressive riding positions
Fit & Construction
The GTO S11 uses Assos’ refined regularFit, optimized for endurance riding rather than race-tight compression.
cranKio Tec
A shaping technology around the hips that:
- Minimizes bunching during pedaling
- Reduces wrinkles and friction
- Keeps the shorts stable through the pedal stroke
zeroPressure Waist
A highly elastic waistband construction that:
- Prevents pinching
- Improves support
- Maintains comfort during long rides and climbing efforts
Stability & Leg Grip
rollBar System
Borrowed from Assos’ race-oriented designs, this stabilizing structure:
- Keeps the chamois securely positioned
- Prevents shifting during climbing, sprinting, and cornering
INject Leg Gripper
Integrated silicone grip at the leg openings:
- Holds the shorts securely in place
- Reduces friction
- Resists degradation from sweat and UV exposure
GTO S11 Chamois Insert
The insert is one of the major highlights of the bib shorts.
Shock-Absorb Damping System Twin
A dual-layer 21 mm padding system that:
- Improves shock absorption
- Adds support beneath the sit bones
- Helps reduce saddle fatigue on ultra-long rides
goldenGate 2.0
A floating chamois construction allowing the insert to move naturally with the rider:
- Reduces friction hotspots
- Improves mobility
- Enhances comfort during continuous pedaling
kraterCooler + whirlKrater Ventilation
Perforation systems designed for active airflow:
- Pull cooling air through the insert
- Improve moisture management
- Keep the chamois cooler and drier in hot conditions
Best For
These bib shorts are especially suited to:
- Endurance road cycling
- Gran fondos
- Ultra-distance rides
- High-volume training
- Riders prioritizing saddle comfort
Summary
| Feature |
Benefit |
| OSSIDIA fabric |
Compression + smooth comfort |
| cranKio Tec |
Less bunching and friction |
| rollBar system |
Insert stability during movement |
| zeroPressure Waist |
Pressure-free support |
| 21mm GTO insert |
Maximum long-ride cushioning |
| goldenGate 2.0 |
Reduced chafing |
| Cooling perforations |
Better breathability |
Compared with standard performance bib shorts, the GTO S11 focuses more on all-day comfort and reduced fatigue rather than pure race compression, making it one of Assos’ top-tier endurance bib options.
