One Aero Guard | Rule 28 Cutting Edge Cycling Apparel
Rule 28 One Aero Calf Guards fitted on athlete's legs, textured surface for watt savings in triathlon.

One Aero Calf Guards

Sale price£34Regular price £40

One Aero Calf Guards are designed specifically for triathletes, bringing aerodynamic savings to your bike leg. Utilising the same technology as our aero socks, but unbridled by UCI rules, the increased length of Aero Calf Guards over our socks brings extra aerodynamic savings.  The One Aero Calf Sleeves outpace our previous generation of fabrics and surpass all but our top-tier Neo Collection.

Based on our One Aero Socks, This new generation of guards sees a switch from knitted fabrics to woven, which are lighter and provide greater aerodynamic savings.

The absence of material covering the foot means they are legal to wear under your wetsuit during the swim, saving you even more time in T1.

When is comes to £ per Watt savings, aero calf guards are the best value upgrade you can make in all of triathlon: delivering greater drag reduction than a top-of-the-line aero wheelset, for less than 1% of the price.



Color
Color: Black
Size
Size: S

Why shop with Rule28?

Dec 24, 2024

Usual

Product arrived quickly

Jimmy W.

Dec 20, 2024

Favourite cycling brand

Love their customer service

Jack M.

Dec 1, 2024

Super service

My orders have been shipped immediately. Great service

David S.

Oct 29, 2024

A Great shopping experience

Easy peasy. No pressure good quality at reasonable prices delivered promptly.

Spencer I.

Oct 29, 2024

Delivery

Purchase and delivery process was very good

Daniel R.

Oct 1, 2024

Well priced with a generous discount

Great discount for top notch products

David B.

Sep 25, 2024

Superb

Superb.

Andre S.

Sep 20, 2024

Brilliant Cycling Performance Wear

Excellent products and quick delivery. Really like the Gravel Skin Suits.

Ian J.

Global FAQs

What shipping options are available?
Rule 28 offers standard and express shipping options. The availability of specific methods depends on your location and the weight of the order.
Do you ship internationally?
Yes, Rule 28 provides international shipping to many countries. Additional customs or import fees may apply. For shoppers in North America, please use na.rule28.com.
How long does delivery take?
Delivery times vary based on the shipping method selected and your location. Standard shipping usually takes 5-15 business days depending on your country, while express shipping can be faster.
What are the shipping costs?
Shipping costs depend on the destination and the size of the order. You can calculate the shipping fee at checkout before finalizing your order.
Is there free shipping available?
Free shipping may be offered for orders over £100 for UK and EU customers. Additional costs like Import duties may still apply.
How do I track my order?
If you selected tracked shipping at checkout, once your order is dispatched, you'll receive a tracking number via email. Use this number to track your order's status online.
What should I do if my order is delayed?
If your order hasn't arrived within the estimated timeframe, contact Rule 28’s customer service for assistance. Ensure to have your order number ready.
Do you ship to PO boxes or APO/FPO addresses?
Yes, we do.
Are there any additional customs fees for international orders?
Yes, international shipments may incur customs or import fees, which are the responsibility of the customer.
Can I change my shipping address after placing an order?
Address changes may be possible if your order hasn't been dispatched. Contact customer service as soon as possible to request changes.
Are there sponsorship opportunities for new athletes?
Rule 28 occasionally features new athletes. Interested individuals can apply via our sponsorship page.
How does Rule 28’s apparel contribute to athletic success?
Aerodynamic drag accounts for over 80% of total energy expenditure at race speeds. Optimizing your clothing has a serious impact on lowering your drag, significantly more than a top of the range aero frame or wheel set. Reducing your aero drag will help you ride faster for less effort.
What other services or benefits does Rule 28 offer?
Beyond supporting athletes, Rule 28 offers worldwide shipping, crash replacement discounts, and responsive customer support.
Why is fabric selection important in aero cycling apparel?
Fabric types, such as woven and knitted, have distinct constructions that impact performance, functionality, and aerodynamic efficiency. Each fabric is selected to optimize speed.
What are the advantages of compression fabrics in cycling?
Compression fabrics in items like Ultra Bib Shorts enhance muscle support, reduce fatigue, and improve endurance by reducing muscle oscillation during intense rides.
What is the purpose of the High-Speed Base Layer?
The High-Speed Base Layer is engineered for speeds between 35-50 km/h, offering elite-level aerodynamic performance for road sprinters and track racers.
How does Rule 28 test aero socks?
Rule 28 conducts aero testing in the Silverstone Sports Engineering Hub, ensuring every product we produce will make you a faster rider.
What makes the Aero-Ish Socks unique?
The Aero-Ish Socks balance comfort and aerodynamic benefits, offering a solution for riders who prioritize comfort but want improved performance.
Why is aerodynamics critical in cycling?
Aerodynamics significantly affects a cyclist's speed and energy efficiency, as reducing drag allows for faster rides with less effort.
What innovations are included in the latest overshoes?
Rule 28’s new overshoes feature advanced materials and designs to maximize aerodynamic gains while maintaining durability.
How are new designs tested for performance?
New products are rigorously tested using wind tunnels, real-world cycling scenarios, and performance data analysis to refine their aerodynamic properties.
What is the main focus of Rule 28's R&D efforts?
We produce the fastest kit on the market. We maintain a constant focus on R&D to stay ahead of the competition and keep you ahead of them too.
How does Rule 28's approach to aerodynamics benefit everyday cyclists?
While designed for elite performance, Rule 28’s products are engineered to provide measurable speed benefits and comfort enhancements for all riders.

Worn By Champions

Worn by the world's best riders including men's and women's Tour De France Champions.

Worldwide Shipping

We're UK based but we ship worldwide with multiple shipping options available at checkout.

Crash Replacement

Kit damaged beyond use? Send us a photo and get a discount on new kit.

Customer Support

Any questions? We're here to help you, use our web chat or email us.
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