More coverage on the Endura Helmet http://www.bikeradar.com/...ura-goes-aero-50754/
The big story, however, is the new D2Z Aeroswitch helmet. This Â£350 (about US$455) TT helmet at first glance looks like your traditional long-tail TT lid, albeit one with a neat integrated visor and a Koroyd core.
On further inspection you notice that the long tail differs from its competition as it's much broader. Simon explains: "There has been a shift towards short tailed helmets because often the tail design is ineffective. Our research showed us that the tail needed to be wider to provide stable flow off the back of the head and onto the skin suit. Testing confirmed that the wide tail was faster and also less sensitive to head movement".
Endura claims that the Aeroswitch has an increased drag saving over all of its biggest competitors with the 11.8 watt saving at 40kph (compared to a standard Endura Airshell helmet) rising to 39.7 watts at 60kph. Its closest rival has 10.8 and 36.3-watt savings. The lineup of its rivals included Kaskâ€™s Bambino, Giro Aerohead, Bell Javelin, Lazer Wasp, Specialized
S-Works TT, Met Drone, Bontrager
Aeolus TT, and Louis Garneauâ€™s P-09.
The Aeroswitch still has one more trick up its sleeve, and thatâ€™s that the long tail can be removed easily to create an aero road helmet with a short stubby tail, which makes the high price tag a lot easier to swallow as it's effectively two helmets in one (and its got the removable magnetic visor, too).
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