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#1
11-26-2007, 04:32 AM
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Wow, aero helmets...
Well, a rep from a fairly well known Canadian company was in a LBS to talk about their TT bikes, and one thing he mentioned was that in an Ironman type of race position, an aero helmet can save 45 watts of power.........
I thought that was somewhat far fetched.......unless you are traveling at 100 miles per hour, no??? I'm thinking I need to get a Bell Meteor helmet and install it on the hood of my Jeep to save on gas.... 
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#2
11-26-2007, 05:15 AM
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One of the guys in our club is freindly with the kid who runs the MIT low speed wind tunnel and does all the cycling work.
There is a significant amount of savings to be had from an aero helmet. I am not sure of the wattage numbers but the time savings over our 11 mile TT course was supposed to rival a disc rear wheel. At one time there was also a significant difference in helmets available to the US market. With the growth of triathlons and the expansion of options, the variations have lessened quite a bit. BK
__________________
HED Wheel afficianado Age is a case of mind over matter. If you don't mind, it don't matter.
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#3
11-26-2007, 06:38 AM
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None shall pass.....
You know, I'm begining to think my helmet may not be so aero?
 William 
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#4
11-26-2007, 06:43 AM
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JG
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#6
11-26-2007, 06:56 AM
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get on the bandwagon man. Between aero helmets and ceramic bearings we will reduce our dependence on foreign oil. It's big! JG
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#7
11-26-2007, 06:57 AM
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#8
11-26-2007, 06:58 AM
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#9
11-26-2007, 07:17 AM
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i bought williams aero helmet from him...he told he it was worth 125 bucks... or it was 125 watts? i forget now... but it was 125 additional something... could go from 18mph to 26 while training less that i do (not) now... its hot though... unless used below 5 degrees f.
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#10
11-26-2007, 07:44 AM
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#12
11-26-2007, 10:09 AM
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race/ride with an aero helmet (TT style) and hit a long coasting down hill. keep your head straight, and watch your MPH, then tilt your head down and watch your MPH drop.
that long tail up in the air is the worst...watching TT's and seeing guys drop their head when they start to get tired...you just know they are dropping time.
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#13
11-26-2007, 10:17 AM
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From what I understand, the helmet is the best aero gear once the position has been sorted. Wheels come in second to the helmet in aero TT gear. I think that number is compared to a regular helmet which in notably not aero. Simply putting plastic wrap on a regular helmet to close off the vents is a trick some have used as it is a big improvement since helmets are required these days. As stated above, all this is negated when the head is no where it should be so form is a must. Head down with those helmets not only eliminates the advantage, it creates a massive air dam.
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#14
11-26-2007, 10:20 AM
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Other major savings can be found in number placement as well. The skin suit helps as well. You don't want all these sail-like protrusions on the body as that's where the air has the toughest time getting around. The wheels are easy in comparison.
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#15
11-26-2007, 10:23 AM
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in my limited experience.. an aero helmet and a disc wheel instantly buy you time in a tt. the longer the tt the more time. its really true.
i never trust the numbers offered.... but it is buying yourself time and that makes it really valuable gear.
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