Aero Calf Guards | Rule 28 Cutting Edge Cycling Apparel
Aero Calf Guards | Rule 28 Cutting Edge Cycling Apparel

Aero Calf Guard

Regular price€33,95


Triathletes rejoice!

Rule28 Aero Sleeves 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 AeroGuard over our socks brings extra aerodynamic savings. 

The absence of material covering the foot also mean they are legal to wear under your wetsuit during the swim. This feature saves you even more time in T1 as it's one less thing to put on before your bike leg.

If you have any questions regarding sizing, please contact us at and we will do our best to help you out.

Domestic (United Kingdom)

Shipping Option Condition Price
Standard (within 3-5 business days) NA £2.95
Tracked (within 2-3 business days) NA £3.95
Tracked Free (within 2-3 business days) Order > £100 £0.00
UK Express (within 1-2 business days via courier) NA £6.95



Shipping Option Condition Price
Standard (within 5-10 business days) NA £6.50
Tracked (within 3-7 business days) NA £12.95
Tracked Free (within 3-7 business days) Order > £150 £0.00


Rest of the World

Shipping Option Condition Price
Standard (within 10-14 business days) NA £6.50
Tracked (within 5-10 business days) NA £12.95


Please note, all stated delivery times are estimated and are from the day of dispatch not from the day of order, which may not be the same.

*UK Express delivery is NOT guaranteed to the following postcodes and areas – most of the Scottish Highlands, any remote areas, including nearly all AB, IV, KW, LA, PA, PH, BT, CA18 - CA27, HS1 - HS9, IM, TR21 - TR25, ZE postcodes.

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Shoe size correlates very well to lower leg length. It is a number that most people know already and so saves time measuring your leg.

If you have very slim claves and are close to the border in sizes, then we would recommend sizing down.

No, these are for aerodynamic benefit only and do not provide any compression. The tightness needed to achieve compression would seriously impact aero performance.


Tailored performance

ITU Legal to wear under a wetsuit, our calf guards are longer than our aero socks to bring you the maximal aero saving possible.

Choose aero guards

Save Time

Save approximately 35 seconds on a 4 hour Iron Man bike leg or 46 seconds on a 6 hour bike leg.

That's more than a disc wheel would save you!

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