hydration for 70km ITT

[jules21]

I'm about to sign up for 70km Tour de Valley ITT on the Goldie - on 21 Oct.

At about ~2 hours (hopefully less) of riding, it's struck me my single aero bidon isn't going to be enough.

I don't have one of those tri-athlon style seat-mounted bidon cages, but I do have a camel back. The camel back doesn't seem very aero though.

Any ideas?

[nickobec]

The camel back doesn't seem very aero though.

That is not what is said here https://road.cc/content/news/34048-uci- ... time-trial

[Derny Driver]

Camelback is a bit over the top.

In a 40k TT you would be lucky to have more than a couple of sips of water. Over 70k, one normal bidon will be plenty. If you seriously think you will lose a 70k TT by the time saving of an aero bottle over a normal bottle, then you are kidding yourself.
Change bidon cages and run a 600mL bidon.

For a prologue or any TT up to 20km I would always remove the bidon cages from my bike. You can ride 30 minutes on nothing.
For an hour, half a bidon.
2 hours, 1 bidon.
You dont have time to drink in a TT anyway, not if you are on the threshold the whole time.

[jules21]

thanks Nick and DD. I'll go with the simplest option - single bidon. I have a 900ml one somewhere.

[g-boaf]

I'm about to sign up for 70km Tour de Valley ITT on the Goldie - on 21 Oct.

At about ~2 hours (hopefully less) of riding, it's struck me my single aero bidon isn't going to be enough.

I don't have one of those tri-athlon style seat-mounted bidon cages, but I do have a camel back. The camel back doesn't seem very aero though.

Any ideas?

Those Camelback solutions got a lot of attention for being aero, then the UCI cracked down on them so that they are to be about hydration and not aero improvement. I did have the technical reg document, but cannot find it on the crappy search on the UCI website.

[MattyK]

For 70km in Qld I'd be wanting more than one bottle, but maybe that's because I suck.

Those Camelback solutions got a lot of attention for being aero, then the UCI cracked down on them so that they are to be about hydration and not aero improvement. I did have the technical reg document, but cannot find it on the crappy search on the UCI website.

Took me a while to find it...

Page 41.

http://en.static.uci.deltatre.net/mm/Do ... nglish.pdf

In short: No behind-the-seat, no between-the-arms. Down tube or seat tube only, or a soft camelback. Aero bottles OK within limitations.
4 cm min width
10 cm max width/depth
400 ml min - 800 ml max