We’re unable to verify Giro’s claims, but 25mph is nearly twice as fast as I’d ride 160km. However, there is the argument – put forward by aerodynamicist Dan Bigham and others – that aerodynamics matter to slower cyclists at lower speeds even more, due to the extended duration out on the asphalt. The Giro Roc Loc Air system was specially developed for the Giro Aero helmets. This new system creates a small layer of air between your head and the helmet, so that the helmet floats just above your head, as it were. As a result air can flow over the top of your head, which ensures good ventilation. Just like the Roc Loc®5 system the helmet can be easily adjusted. The tension around the head and the vertical position can be adjusted using one hand. With this system, Giro is setting a new standard for helmet ventilation and comfort. Tell us what the product is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Riders these days are paying more attention to safety than ever before, and it’s refreshing to see that Giro hasn’t merely glossed over that aspect in developing the Vanquish MIPS. As the name suggests, a low-friction MIPS liner is included as standard equipment, with the claimed benefit of reducing rotational forces transmitted to the brain — and, thus, the chances of a traumatic brain injury — during an impact. That MIPS liner is molded as a single piece with the Roc Loc Air retention system to improve fit quality and airflow. The new Vivid shield by Zeiss is what most riders will see as the defining feature of the Vanquish. This magnetic shield makes the Vanquish even faster by streamlining airflow, and features an all new road-tuned Vivid™ lens that increases contrast and definition while keeping colors true-to-life. Meanwhile, MIPS, as is now well-known, is a brain-protection system that via a internal cradle helps absorb rotational forces to the head in the result of a crash. The two-piece shell combines a tough outer hard shell with a polycarbonate lower shell permanently fused to the liner

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custom tune fit tension and fore-aft tilt of the helmet in seconds using a single hand. Super Fit™ Engineering However, in reality, these numbers mean very little. If any of us were able to ride a 40km time trial at 400w we wouldn’t be buying our own helmet rather wearing the brand that sponsors our pro team. around the rider's head while forcing heat and stale air out. It's the most effective cooling system available, and

The padding also has a luxurious feel to it and sits in the optimum place on the forehead, providing plenty of comfort and mopping up sweat. It even has the added benefit of producing a cool stream of air from the two larger rear vents that is directed down your spine, particularly welcomed in the recent good weather that we have unusually had in the UK. There is one issue I have with the Vanquish and whilst it might be relatively trivial to many it is the proverbial fly in the ointment for me. The looks. When it first arrived, the squared off shaping and awkward split personality styling reminded me of a Horseshoe Crab (look it up). Not the most beautiful of creatures.Giro says its new Vanquish MIPS is the most aerodynamically efficient road helmet the company has produced to date – and nearly the best ventilated, too. active vents in the helmet's shell with exhaust channels inside the helmet that thrust fresh, cool air over and Designed to manipulate airflow, a weight-saving in-mould process enabled Giro to optimise their design to be exceptionally aerodynamic and breathable. Strong, impact damping and light, the protective EPS foam liner is bonded to a four-piece polycarbonate shell that has been shaped and optimised with TransformAir technology and ten wind tunnel vents. Improving riding efficiency and shaving seconds off your personal bests, the TransformAir 'cliff' effectively manipulates airflow to reduce drag and improve aerodynamics. One of the most technologically advanced road cycling helmets on the market, the Giro Vanquish MIPS Aero bike helmet is filled with features to streamline airflow for reduced drag and increased aero efficiency. TransformAir technology gives you that extra little nudge, while the RocLoc Air system works to add cooling power and maximise comfort.