This isn’t just a lid for the final sprint, but one designed to keep you well ventilated on a long, hot day in the saddle too. Alongside big side vents, the Bullet has Lazer’s ‘Airslide’: a sliding, honeycomb-shaped cover on the front, running up the middle of the helmet, and it allows you to boost airflow on-the-fly.
Look a little closer and you will see the ‘Ventilation on Demand’ (VOD) system uses tilting slats, which are opened or closed by the Airslide. It’s the Venetian blind of bike helmet design.
If you’re going full gas in a bunch sprint like Greipel, slide the vent down for full aero capability. Then, when you’re just rolling in the peloton on a hot day, slide it up to open the front vent and the slats. It’s a simple but smart solution to the ventilation vs. aerodynamics dilemma.
Those aero priorities do mean a few slight tweaks to Lazer’s typical helmet design, however, and most notably with the use of the a rear dial for adjusting the fit, as opposed to the Rollsys top-mounted retention system used on other Lazer lids.