A local stage race has forbid the usage of time trial helmets (though i intend on fighting this and escalating up if necessary); however, Evade and Air Attack helmets are allowed. If i were to use a road helmet (say old S-works or my Kask K50), how much am I giving up at 22-23 mph for 20 minutes? Would this be equivalent to 5-6 watts of saving and about 20-25 seconds? I would guess the savings at 30 mph would be close to 80-100 gram, but i'd like to see if someone knows for sure
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Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [echappist]
[ In reply to ]
You were going to wear a TT helmet in a stage race...
I think the gerneral thought here is that IF the helmet works for you its around 5-10w but its a big IF
I think the gerneral thought here is that IF the helmet works for you its around 5-10w but its a big IF
Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [echappist]
[ In reply to ]
Don't overlook the LG Course. Not exactly an answer to your question, but worth checking out. Close to the Evade, claimed better than Air Attack and pretty much a normal road helmet look. See green helmet in the GIF above.
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Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [Mtneer]
[ In reply to ]
Mtneer wrote:
Don't overlook the LG Course. Not exactly an answer to your question, but worth checking out. Close to the Evade, claimed better than Air Attack and pretty much a normal road helmet look. See green helmet in the GIF above.And cheap, too.....on sale @ Competitive Cyclist for $119 right now.
http://www.competitivecyclist.com/...3Omdhcm5ldSBjb3Vyc2U
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Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [echappist]
[ In reply to ]
From my wind tunnel data my CdA was .210 with either my Selector or the Specialized McLaren TT helmet. With the Evade it was .219. I didn't do a run with a road helmet, but that seems pretty close to me and that's what I'd use in your situation. Basically 12 watts more drag for the Evade at 30mph.
Kevin
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Kevin
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Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [Power13]
[ In reply to ]
Power13 wrote:
Mtneer wrote:
Don't overlook the LG Course. Not exactly an answer to your question, but worth checking out. Close to the Evade, claimed better than Air Attack and pretty much a normal road helmet look. See green helmet in the GIF above.And cheap, too.....on sale @ Competitive Cyclist for $119 right now.
http://www.competitivecyclist.com/...3Omdhcm5ldSBjb3Vyc2U
Not to hijack the thread but I'm looking for a new helmet and have raced with just my road helmet in the past but I do tape up some of the vents for A races - I know I'm cheap. I'll be racing in Kona this year and I'm more concerned with heat management than the best aero helmet. Looks like the LG Course would be a good option between aero and heat..
Re: Anyone have comparisons of the Evade/Air Attack vs regular road helmets [nslckevin]
[ In reply to ]
thanks to all for the suggestions. it looks like the difference would be about 5 watts or so at 24mph (somewhat hilly TT). For the duration i'm doing, perhaps 10-15 seconds. It's certainly more than i'd like to give up, but not end of the world all things considered.