Assos RSR Bolide Booties S11

The Assos RSR Bolide Booties S11 are elite-level aerodynamic overshoes developed specifically for racing at the highest level of road cycling and time trial competition. Created through ASSOS AeroScience testing and refined with WorldTour rider feedback, these booties are engineered to deliver the maximum aerodynamic advantage allowed within UCI regulations.

Unlike traditional weather-focused shoe covers, the RSR Bolide Booties S11 are designed purely for speed. Every panel, seam, and textile has been optimized to reduce aerodynamic drag while maintaining a compressive second-skin fit. The result is an overshoe that smooths airflow around the shoe, ankle, and lower leg to minimize turbulence at high speeds.

The construction uses advanced drag-reducing textiles with extremely high elasticity, allowing the booties to contour tightly around the foot and ankle without excess material or wrinkles. ASSOS specifically designed the cuff height and shaping to sit right at the edge of UCI legality, maximizing aero gains while remaining race compliant.

The fit is intentionally aggressive and highly compressive, built for race-day performance rather than casual comfort. ASSOS recommends pairing them with low-profile socks and even adhesive spray beneath the cuff to keep the material perfectly positioned during high-speed efforts.

A zipper-free construction further improves aerodynamics by eliminating disruptions to airflow. The raw-cut upper creates a seamless transition between the leg and overshoe, helping maintain attached airflow around the lower leg — one of the most aerodynamically sensitive zones on a cyclist.

Despite the aerodynamic focus, the booties remain lightweight, breathable, and highly packable. They are optimized primarily for warm-weather racing and fast road events where marginal aerodynamic gains matter most.

Key Features / Technical Details

• WorldTour-developed aerodynamic race booties
• Designed for maximum UCI-legal aero gains
• Second-skin compressive fit minimizes airflow disruption
• Drag-reducing textile construction
• Raw-cut cuff for seamless lower-leg transition
• Zipper-free design reduces turbulence and drag
• Lightweight and highly breathable race construction
• Optimized for warm-weather road racing and time trials
• Developed using ASSOS AeroScience wind tunnel testing
• Race-focused fit designed for high-speed riding

Technical Specifications

• Intended Conditions: warm weather / race use
• Fit: racingFit / compressive aero fit
• Composition (foot): 90% polyamide / 10% elastane
• Composition (ankle): 56% polyester / 24% polyamide / 20% elastane

The RSR Bolide Booties S11 are purpose-built for riders chasing every aerodynamic advantage possible. Whether used in road races, time trials, or fast solo efforts, they deliver a highly refined race-focused solution developed directly from the demands of professional competition.