Sure, but absent any evidence, I'd also put an aero bottle on the frame...looks like a round cage down there.

Yeah for sure when in race setup will run a different aero bottle on the downtube. Thanks for your input!

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I don't think that really is emulating what Magnus and Joe have. It's sort of further back and higher up.

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-Of course it's 'effing hard, it's IRONMAN!
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Yup definetly higher than their setups, I can pull it in closer to the saddle. Just something I'm playing with on my new bike, would probably not work well in transition with most bike racks.

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That’s a wee little bike.

I have nothing more to add. 🤪😁😎

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Curious: Is the bottom BTS aero bottle just for aero purpose of are you able to use it while riding? Is it hard to put it back? I wonder if I would flip the bottle cages (aero on top, round at bottom) to make it easier but it might negate the aero benefit if any?
Uneducated guess but I'm assuming this set up works for so long as you're not actually lower than the top of the bottle. I'm playing with my setup but my priorities at this stage are maximizing capacity, avoiding bottle launches and easy access.

Haven't used it on the road yet just playing around with setup. Wouldn't use the aero bottle for hydration only for aero purposes and may use for storage if needed.

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Was borderline between the small and XS cuz I'm only 5'6"ish. Didn't want to go XS cuz of the 650c wheels, glad I didn't as the small gives me enough reach.

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The point of the two aero bottles behind the seat was to act as a fin that reduces vortex shedding. That's the thing that makes your car shimmy when you follow a tractor trailer too close. A vortex is formed from the left side and build enough to cross the centerline. As it loses momentum and falls further off the body the low pressure zone now on the right side allows another vortex to form. When that one falls off the low pressure zone now on the left allows another vortex to form. And so on and so on.

Putting a fin along the centerline behind the body can stop the formation of these vortices. Whether this specific bottle setup on your specific body position in specific weather conditions can stop vortex shedding is a complicated question. I'd just go for the safe bet and put as few bottles horizontal as close to your body as you can.

Thanks for the reply! That's what I'm trying to achieve, will tuck the bottles in closer to the saddle and test when I have the opportunity.

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Not an aero recommendation but that aero bottle behind the saddle uses pinch type "fingers" at the top. They will probalby not hold the bottle if you hit a decent sized bump. I have the same type (mine is a Profile Design) that sometimes ejects the bottle on big bumps and mine is mounted on the down tube so it is right side up.

 

Not sure what distance you compete but that system is faster than getting dehydrated and having to walk the aid stations.


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Once, I was fast. But I got over it.

Thanks for the input but won't be using the rear aero bottle for hydration, may use for additional storage if needed and will be taping to it's cage to avoid launching.

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My thing with a lot of this stuff that doesn't have "straw" hydration is that it can be as aero as possible then when you have to drink and you have to reach all over the place and lose that. Folks can say all they want they just will drink up a steep hill or when slowing down anyway, but that's not when your body wants the hydration/mix. It wants it when it wants it.

So I still feel like these kind of setups should only be to supplement a straw drink setup so that you stay in aero to drink and only use these fancy setups to topup.