It depends on what you mean by "impressed". I was impressed by how bad the Argon E118 is, for example.

even round water bottles on non shrouded frames aren't 40 sec per 40k =)

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

I have seen varying estimates of the drag for round bottles. But, I agree that a round bottle on the downtube of a P4 would not cost 40s/40 km. That's not what I was suggesting though. I was suggesting that the drag savings for the P5 vs P4 both with a round bottle on the downtube could be 40s/40 km - some of the time savings coming from shielding the round bottle on the P5 and the rest of the time savings coming from other improvements on the P5. If the P4 is ~ 40s/40 km faster than the P3, and the P5 with a round water bottle on the downtube is another ~40s/40 km faster than a P4 with a round water bottle on the downtube (the configuration I would use), then going from a P3 or P2 to a P5 could be pretty darn significant.

it wont be that much, the p4 shields round bottles really well already.

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

More insight here:

http://www.bikeradar.com/...january-debut--32698


.

That was kinda fluffy. I really doubt the P5 wont be UCI compliant at least in some form. I also wonder how far various triathlon federations will allow bolt on fairings. Hopefully no one pushes thing so far in that respect that UCI type frame specs are issued.

My guess is the front fairing, if its real, will be a very integrated water bottle.

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Styrrell

Booo! 2.5cm more stack, 8mm less reach vs the p4

I ride a 54 cm P2 with about 2 cm of spacers and a 100 mm stem. I could actually use a touch more reach. A 56 cm P5 might be just about right with a 90-100 mm stem and no spacers.

They can not build a bike that will suit every single rider. So with that being said, those who do not think the P5 will fit them keep riding your P4/P3. For those that can ride the new P5, please let me know when you are selling your P2 in a 54cm size and I can maybe help you out with funding your new purchase.

that depends Jack, my data showed an arundel on my old frame was 59g at 10deg.

or 24sec for an "aero" bottle onteh seattube

Isn't that effectively the same as riding a at P3/4 with a conical top cap at 1cm and 1.5 cm of spacers with a 72 degree head tube angle if you have a flat top cap on the P5? I have not done the trig, but it seems close.

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Suffer Well.

wait . . . 'easier geometry' AND 'revised' brakes?!?!

christmas is comin' early this year! go ahead and bill me $15 000 for the frameset; i'll pre-pay.

-mike

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https://lshtm.academia.edu/MikeCallaghan

http://howtobeswiss.blogspot.ch/

well 24 < 40
=)

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

not round, which might ne worse?? ;)

edit:nevermind 8 MILLImeters less reach.

i could still ride that, just need a slight downangled stem.

almost everyone can still ride it in the good ole p3 position

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

I don't think seasonschange rides with either of those.

That would def put me out of business for one. I'd have to move up to a 56 to deal with the reach and that'd add even more that the 2.5cm stack.

or just get a really long stem.

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

Ventus :)

It was more of a generic question rather than directed towards seasonschange.

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Suffer Well.

yeah good point, i wonder if the p5 + vision > p4 + ventus?

although I really am curious if the ventus is that vastly different with rider and torpedo mount bottle on the bike.

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Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter

use tula with custom steel pipe extensions if you need the mantis/semi mantis (i do) seems like the best option.

i found the lowest headset cap that i could get my hands on AND i have to use a -35degree stem and a relatively low stack bar, vision with hed clip lites.

i guess ill have to stick with my p3sl alum for a bit longer.

I should say I'm sure I could get on one and get probably within the margin of error with something like vision or zipp. But i surely would have to test the sizing out first where now its pretty much 54 and i'm good with whatever I do on the front end. But really ventus >>> than the others in cool look faster so that totally over rides everything anyways ;)

Is there a nice summary somewhere of the stack / reach / aero tradeoffs of the various bars? Is the vision the lowest?

My current position on my P2 + vision has the stem going slightly downward. I guess this is not a big deal particularly if there's a horozontal water bottle in there, which would be blocking the whole stem area anyway.

At some point this changes handling though as your body weight shifts forward. My nose is already well forward of my front wheel hub even with a 105 stem. I assume a stem < 120 and you're still within the limits of reasonable handling? (gulp)