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Giro Air Attack Helmet

Sale $99.97 - $199.95

Item # GIR007C Past Season Colors

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Item # GIR007C

Such a drag ... reducer.

Traditionally, aerodynamic cycling helmets have relied on sloping shapes, minimal venting, and a teardrop tail design to dictate the flow of air in order to overcome aerodynamic drag. However, with Giro's new Air Attack Helmet, its engineers had to rethink the shape of this typical design. The reason for this was simple — the objective of the Air Attack was to mate an aerodynamic helmet with a design that was compact, well-ventilated, and able to be worn for long periods of time, without the cumbersome, sometimes goofy aesthetic of a traditional aero helmet.

To start, the helmet was designed with a similar frontal area as Giro's Selector time trial helmet, only with a new "chopped-off" rear section. Wind tunnel testing proved that the air still "thinks" it's moving around a long tail, when, in fact, the excess material no longer exists. In addition to now having roughly the same minimal drag (only 11% more) than the Selector, the Air Attack provides a drastic increase in weight savings. In fact, the claimed weight of the Air Attack is 264g versus the Selector's 430g.

The second major consideration when designing the Air Attack came down to thermodynamics. After all, Giro's engineers knew that a lightweight, aerodynamic helmet was worthless to the peloton if didn't ventilate well. This led Giro to the development of what it calls "the Therminator," which is a head-form heated to the temperature of a human, with "thermo-couples" added on the outside. The information relayed from this system allowed engineers to map out parts of the head that stayed both cool and warm in the wind tunnel, which let Giro locate where vents were working and where they were not. What Giro found was that as air hits the rider, there is a very high pressure zone right at the forehead. In response, the Air Attack's new fit system, known as Super Fit, suspends the rider's head off of the EPS, allowing air entered in that front three millimeter portion of the helmet to flow over the top of the head and out the large, strategically placed back channels. Remember that 11% additional drag over the Selector? The 28% increased cooling power achieved ought to make up for it.

The Attack isn't as light as Giro's fully-vented and top-end Aeon helmet, but it still provides you with 97% of its cooling efficiency and an 11% boost in aerodynamic efficiency. We'll let you weigh the trade-off.

READ OUR REVIEW

  • Lightweight, tail-less design
  • 11% boost in aerodynamic efficiency
  • Super Fit system

Tech Specs

Shell Material:
[shell] in-mold polycarbonate, [liner] EPS
Ventilation:
6 vents
Fit Adjustment:
Roc Loc 5
Visor:
no
Recommended Use:
triathlon, cyclcross, road cycling, mountain biking
Manufacturer Warranty:
1 year

Size chart

Fuji Bicycles

 

Geometry Chart

 

Altamira LTD
 

Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Standover

(SO)

Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay Length

(CS)

Wheelbase

44 44.0cm 51.5cm

51.7cm

36.3cm 72.1cm

12.0cm

72.0 deg 75.0 deg 6.9cm 40.5cm 97.1cm
47 47.0cm 53.0cm

52.8cm

37.0cm 74.1cm 13.0cm 72.5 deg 74.5 deg 6.9cm 40.5cm 97.7cm
50 50.0cm 54.5cm 54.0cm 37.0cm 76.0cm 14.0cm 73.0 deg 73.5 deg 6.9cm 40.5cm 97.6cm
53 53.0cm 56.0cm 56.0cm 37.9cm 78.3cm 16.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 98.6cm
55 55.0cm 57.5cm 58.0cm 38.9cm 80.1cm 18.0cm 73.5 deg 73.5 deg 6.9cm 40.5cm 100.1cm
58 58.0cm 59.0cm 60.1cm 39.7cm 82.1cm 20.0cm 74.0 deg 73.5 deg 6.9cm 40.5cm

101.0cm

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