Wind Tunnel Tested to Save Up to 12.5 Watts

Looking for one of the fastest ways to reduce drag without changing your bike position? The new EZ Gains veloToze Aero Compression Calf Guards have been tested in the wind tunnel and shown a saving of up to 12.5 watts over shaven legs, with further testing showing a 2–6 watt advantage against other leading calf guard brands.

For triathletes, time trial riders and non-UCI events where aero calf sleeves are permitted, that is a serious gain from a simple equipment upgrade.

Why Aero Calf Guards Matter

In cycling and triathlon, the lower leg is constantly moving through clean airflow. That means socks, calf guards and leg sleeves can have a bigger aerodynamic effect than many riders expect.

Standard skin, shaved legs and ordinary socks do not always manage airflow efficiently. Aero calf guards are designed to create a smoother, faster interaction between the rider’s lower leg and the air passing around it.

The result can be reduced aerodynamic drag, improved CdA and a lower power requirement at race speed.

Wind Tunnel Tested at Silverstone

The latest veloToze calf sleeves were tested at Silverstone Sports Engineering Hub, a specialist cycling wind tunnel used for aerodynamic performance testing.

The test day included independent engineering support and around ten witnesses as part of an EZ Gains open day. The aim was simple: test the new version against shaven legs and against other leading brands to see whether the updated design produced measurable gains.

The Result: Up to 12.5 Watts Saved

The biggest headline from testing was a saving of up to 12.5 watts compared with shaven legs.

For athletes chasing marginal gains, that is a major result. A saving like this can help riders maintain the same speed for less effort, or hold a higher speed for the same power output.

That matters in long-course triathlon, time trials and any event where aerodynamic efficiency can translate into saved energy before the run or final part of the race.

2–6 Watts Faster Than Other Leading Brands

The new veloToze calf guards were also tested against other leading brands. In those comparisons, they delivered a further 2–6 watt saving.

That is important because not all aero socks and calf sleeves perform the same. Fabric texture, fit, height, compression and how the sleeve sits on the leg can all affect performance. A product may look aerodynamic, but the real answer comes from testing.

CdA Reduction: 0.002 to 0.006

Alongside watt savings, the testing showed a CdA reduction of 0.002 to 0.006 compared with other leading brands.

CdA is one of the most important numbers in cycling aerodynamics. It refers to drag area: how much aerodynamic resistance a rider and bike create while moving through the air. Lower CdA generally means less drag and better speed for the same power.

For competitive riders, even small CdA changes can matter over race distance.

Designed for Triathlon and Non-UCI Time Trial Events

The EZ Gains veloToze Aero Compression Calf Guards are designed for triathlon and non-UCI time trial events. If you are racing under specific governing body rules, always check the latest event regulations before race day.

You can review current rule resources from World Triathlon and the latest UCI technical regulation clarification guide.

Built for Speed, Comfort and Race Practicality

Aero performance is only useful if the product is comfortable enough to race in. These calf guards combine aerodynamic fabric with active compression to support blood flow while riding or running.

They also use non-slip silicone dots to help keep the sleeves in position. That matters because a sleeve that rolls, slips or bunches up can lose the fit that made it aerodynamic in the first place.

For triathletes, they can also be worn under a wetsuit to help speed up transition and avoid having to pull them on after the swim.

Who Are They Best For?

These calf guards are best suited to riders and triathletes who care about measurable aerodynamic gains. They are particularly relevant for:

• Long-course triathletes
• Middle-distance triathletes
• Non-UCI time trial riders
• Duathletes
• Athletes already optimising position and kit
• Riders looking for affordable watt savings

If you have already invested in aero hydration, a disc wheel cover, a fast helmet or a good bike fit, aero calf guards are a logical next step.

How They Fit Into a Faster Race Setup

Aero gains are rarely about one single product. They usually come from stacking improvements across the full rider and bike system.

For example, pairing the veloToze Aero Compression Calf Guards with other EZ Gains products such as the EZ Hydro-Gains hydration systems or the EZ Disc wheel cover can help create a more complete aero setup.

The goal is simple: reduce drag, save energy and arrive later in the race with more left to give.

FAQ

How many watts can the veloToze Aero Compression Calf Guards save?

Testing showed a saving of up to 12.5 watts compared with shaven legs, and a 2–6 watt saving compared with other leading brands.

Where were they tested?

The testing was carried out at Silverstone Sports Engineering Hub, a cycling-focused wind tunnel facility.

Are aero calf guards legal for racing?

They are designed for triathlon and non-UCI time trial events. Always check the latest rules for your specific race, federation and event category.

Can I wear them under a wetsuit?

Yes, they can be worn under a wetsuit, which can make them practical for triathlon transitions.

Are they only for elite athletes?

No. Any rider looking for aerodynamic gains can benefit, especially if they are racing at speeds where drag becomes a major performance factor.

Final Thoughts

The new EZ Gains veloToze Aero Compression Calf Guards are a strong example of how small equipment choices can make a measurable difference. With wind tunnel testing showing up to 12.5 watts saved over shaven legs, plus further gains against other leading brands, they offer a serious aero upgrade for triathletes and time trial riders.

If you are chasing free speed, reducing drag and building a faster race-day setup, these are a simple upgrade with real data behind them.