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Castelli Aero Race Pro 20 Rosso Corsa Cycling Socks, Belgian Blue

Castelli Aero Race Pro 20 Rosso Corsa Cycling Socks, Belgian Blue

We set out to make an aero sock that doesn’t compromise on the things that make a great sock.

Reference 4526031_424-L/XL

€25.00

€20.00 Save 20%

VAT included

Manufacturer's recommended retail price: €25.00 You save 20% on the recommended retail price (€5.00)

Clothing Sizes: L/XL

L/XL
XXL

Colour: Blue

Blue

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N.1 in Italy in the Bike and E-Bike Shops

We set out to make an aero sock that doesn’t compromise on the things that make a great sock. Working with expert Italian knitters and state-of-the-art machinery, we created a structure that combines smooth and textured zones to control airflow and reduce drag — without sacrificing comfort or fit. The result is a sock that stays up, feels great, and delivers aero performance equal to ribbed Lycra® cuffs — with the bonus of true everyday wearability.

PRODUCT FEATURES
Traditional sock comfort with raised aero ribs
Developed to provide everyday aerodynamic gains
Durable and breathable construction
90% polyamide / 10% elastane mix for optimal comfort and fit
20 cm cuff

TECHNICAL FEATURES
Insulation: 1/5
Waterproofness: 1/5
Windproofness: 1/5
Breathability: 4/5
Lightness: 4/5

Weight: 46 g
Temperature: 10°C - 35°C / 50°F - 95°F
Fit: Race

Rosso Corsa
Our Rosso Corsa label is only applied to the highest-level products we make. Every thread and fiber, every curve and contour is obsessed about. Rosso Corsa represents a categorical breakthrough in cycling innovation and the meticulous craftsmanship you expect from Castelli’s performance-enhancing apparel.

PRO RIDERS
Garment supplied to the Soudal Quick-Step Team riders.

Reference 4526031_424-L/XL

Data sheet

Gender: Men
Material: Polyamide
Code: CASTS26
Compression: No
Season: All season
Use: Cycling

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Who it is for and how to use it

Ideal for

Road cyclist focused on aerodynamics

Designed for those looking for a technical sock with an aerodynamic structure, Race fit and good breathability. The 90% polyamide / 10% elastane blend helps maintain comfort and support during cycling use.

Anyone riding all year round

Suitable for 4-season use, with 1/5 thermal protection and 1/5 water resistance. It is indicated when a lightweight, breathable sock is needed, not a garment for protection against cold or rain.

Cyclist wanting a lightweight technical sock

The 46 g weight and breathable construction make it suitable for those looking for an essential item, with a close feel on the foot and good airflow management.

Use cases

Ideal

High-tempo road rides

The Race fit and aerodynamic construction are designed for road cycling use, where reducing air resistance matters.

Race fit · Aerodynamic structure · Road cycling

Very suitable

Mid-season training sessions

With 4/5 breathability and 1/5 thermal protection, it works well when heat management matters more than insulation.

4 seasons · 4/5 breathability · 1/5 thermal protection

Suitable

Everyday cycling use

The structure is also designed for daily wear, with traditional comfort and the sock staying in place.

Daily use · Comfort · Fit

Who it is for

Experienced road cyclist

Looks for: A technical, lightweight sock with a Race setup.
Why: The aerodynamic construction, 46 g weight and polyamide/elastane fabric meet performance-oriented use requirements.

All-year-round active rider

Looks for: A versatile sock for 4 seasons with good breathability.
Why: Breathability 4/5 and thermal protection 1/5 make it suitable when ventilation is the main requirement.

Frequently asked questions

What material is this sock made from?

It is made from 90% polyamide and 10% elastane. This blend is intended to combine comfort and fit.

What fit does it have?

It has a Race fit. This indicates a close-fitting setup, suitable for technical cycling use.

Is it suitable for all seasons?

Yes, it is suitable for 4 seasons. Thermal protection is 1/5, so it is not designed to insulate against the cold.

How much does it weigh?

It weighs 46 g. This is consistent with a lightweight cycling sock.

How breathable is it?

Breathability is 4/5. This helps manage heat during cycling use.

Show all (6)

Does it offer good rain protection?

Water resistance is 1/5. It is not a sock designed to protect against rain.

Information prepared by the BSA team with the support of AI, based on the manufacturer's specifications.

Castelli Aero Race Pro 20 Rosso Corsa Cycling Socks, Belgian Blue

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