Ok not IM distance but I have a MD duathlon next week. I thought I could wing it on 400ml in the Giant Trinity’s aero bottle but I am now thinking for 60km (1:30 ish) I might need more than that. So I was thinking of either swapping out the aero bottle and putting in a 700ml standard bottle or stick a 500ml bottle behind the saddle.
Thoughts?
I’d go for this.
Yeah agree with @buzz that aerocoach bottle test showed a small cost in having a bottle behind your saddle. Big bottle on the down tube probably the worst for drag
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Who the hell has 900ml bottles?
That’s like carrying a keg around with you.
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Did think that 
People who have sweat that pisses out of them 
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IMJ, carry 4 x 1L bottles of tailwind up sheephouse 3 times
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I’m up there with the best of sweaters. But I’ve not seen a bottle bigger than 750 before! 
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4…!
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I have a 900, I think?!
If he’s going to go round Oulton at 40 kph for 90 mins in the summer he might need more than 400, depends on sweat rate I guess.
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Is that a Canyon bike?
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HAHAHAHA - you needed to zoom in to spot the detailed branding I see!
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I recently bought a 950ml bottle - but only to tip me over the free shipping total. Use it for the turbo, haven’t ventured outside with it yet. It is heavy when full!
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Is this the setup for Lakesman?
Yup think so.
I can angle the tool bottle down - but think Id rather keep it vertical as a greater chance it’ll still be there if I need it.
Not sure if leaving the food bag on - gels can go in tri suit, but a bit easier to deal with rubbish.
Not sure if it was Lakesman… but sure I read that food stations you need to stop to pick stuff up yourself. Worst case I’ll just need 1 bottle. Carried all this in training so kinda used to it - even if it adds 2kg to the bike weight.
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My eyes. My eyes. 
Probably about 1kg, yeah?
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Whats up with it - apart from too many weeds along the gutter?
I mean theres at least 2 items on there carrying almost no branding at all 
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depends what’s in it. Could be mega viscous gloop (not the Gwyneth Paltrow type)!
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