Synchro Aero 4E cycling shoe
Synchro Aero 4E: The Aerodynamic Road Shoe Optimized for the Technical Triathlete
The Synchro Aero 4E is designed for the athlete who prioritizes aerodynamic efficiency and foot stability above all else. While a single-strap shoe like our WorldCup is the undisputed leader for raw transition speed, the Synchro Aero 4E is engineered for the "on-the-rivet" performance of the bike leg itself.
By combining a dual-dial closure system with a medial-zip aero shroud, this shoe delivers the precise, locked-in fit of a premium road shoe, with the drag reduction needed for non-drafting triathlons and time trials.
Engineering Strategy: Aero Priority
1. Drag Reduction via Medial-Zip Shroud
In a sport where seconds are won over 40km to 180km, the turbulence caused by dials and hardware matters. The Synchro Aero 4E features a smooth textile cover that encapsulates the closure system. To further refine the profile, we relocated the zipper to the medial (inner) side, removing it from the primary airflow and ensuring a cleaner leading edge on the shoe's lateral side.
2. Dual-Dial Fixation for Maximum Leverage
For daily road training and high-torque racing, foot security is paramount. The dual-dial system allows for independent tensioning of the forefoot and the ankle. This provides a level of mechanical "fixation" that single-strap shoes cannot match, preventing internal foot slip during out-of-the-saddle efforts or high-cadence intervals.
3. The "Triathlon-Ready" Road Shoe
While this is a performance road shoe first, it is not "road-exclusive." We have integrated specific functional details to ensure it remains viable for competitive triathlon:
-
Fly-Mount Ready: Built-in webbing loops allow you to use rubber bands to keep the shoes horizontal on the pedals.
-
Reinforced Heel Pull: A rugged, oversized loop allows for a secure grip when pulling the shoe on at speed, a feature missing from 99% of aero road shoes.
4. 4E Carbon Chassis: The Foundation
Built on our proven 4E flat-bottom carbon sole, the Synchro Aero 4E offers a stable, ultra-stiff platform. The flat geometry increases the contact area with the pedal, reducing "hot spots" and ensuring that every watt of energy is transferred directly into the drivetrain.
Technical Specifications
-
Chassis: 100% High-Modulus Carbon Fiber (4E Flat-Bottom)
-
Aero Cover: Medial-zip textile shroud for laminar airflow
-
Closure: Dual micro-adjustable dials for precision fit
-
Transition Features: Medial fly-mount loops; high-tensile heel loop
-
Colorway: Magical White
-
Cleat Compatibility: Standard 3-bolt road pattern
Original: $331.04
-70%$331.04
$99.31
Description
Synchro Aero 4E: The Aerodynamic Road Shoe Optimized for the Technical Triathlete
The Synchro Aero 4E is designed for the athlete who prioritizes aerodynamic efficiency and foot stability above all else. While a single-strap shoe like our WorldCup is the undisputed leader for raw transition speed, the Synchro Aero 4E is engineered for the "on-the-rivet" performance of the bike leg itself.
By combining a dual-dial closure system with a medial-zip aero shroud, this shoe delivers the precise, locked-in fit of a premium road shoe, with the drag reduction needed for non-drafting triathlons and time trials.
Engineering Strategy: Aero Priority
1. Drag Reduction via Medial-Zip Shroud
In a sport where seconds are won over 40km to 180km, the turbulence caused by dials and hardware matters. The Synchro Aero 4E features a smooth textile cover that encapsulates the closure system. To further refine the profile, we relocated the zipper to the medial (inner) side, removing it from the primary airflow and ensuring a cleaner leading edge on the shoe's lateral side.
2. Dual-Dial Fixation for Maximum Leverage
For daily road training and high-torque racing, foot security is paramount. The dual-dial system allows for independent tensioning of the forefoot and the ankle. This provides a level of mechanical "fixation" that single-strap shoes cannot match, preventing internal foot slip during out-of-the-saddle efforts or high-cadence intervals.
3. The "Triathlon-Ready" Road Shoe
While this is a performance road shoe first, it is not "road-exclusive." We have integrated specific functional details to ensure it remains viable for competitive triathlon:
-
Fly-Mount Ready: Built-in webbing loops allow you to use rubber bands to keep the shoes horizontal on the pedals.
-
Reinforced Heel Pull: A rugged, oversized loop allows for a secure grip when pulling the shoe on at speed, a feature missing from 99% of aero road shoes.
4. 4E Carbon Chassis: The Foundation
Built on our proven 4E flat-bottom carbon sole, the Synchro Aero 4E offers a stable, ultra-stiff platform. The flat geometry increases the contact area with the pedal, reducing "hot spots" and ensuring that every watt of energy is transferred directly into the drivetrain.
Technical Specifications
-
Chassis: 100% High-Modulus Carbon Fiber (4E Flat-Bottom)
-
Aero Cover: Medial-zip textile shroud for laminar airflow
-
Closure: Dual micro-adjustable dials for precision fit
-
Transition Features: Medial fly-mount loops; high-tensile heel loop
-
Colorway: Magical White
-
Cleat Compatibility: Standard 3-bolt road pattern
