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How much water?

Old 07-08-10, 06:19 AM
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How much water?

I'm going touring with over 60 miles between stops. I was planning on carrying (2) 750 ml water bottles and a 2 liter bottle on the rack. Its about 55-60 degrees with under 20% humidity. How much would you carry?
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Old 07-08-10, 06:59 AM
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If you really want to get specific, figure it out a like so....

1) Weigh yourself prior to a ride that is at least 1 hour long, preferably 2+
2) Keep track of how much water etc you drink during the ride
3) Weigh yourself after the ride
4) Calculate: (Your pre-ride weight) - (your post-ride weight) + (the weight of the liquid you drank on the ride)
5) Convert the lost weight into oz / ml of water

Voila, you've figured out how much water you need per hour on the bike. Plan some extra for contingencies and you're set.
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Old 07-08-10, 07:11 AM
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When you say it is 60 miles between stops, what do you mean?

Is it 60 miles between your day's start location (campground, hotel, etc.) and your evening's sleeping location (campground, hotel, etc.) ... but you'll be going through any number of towns etc. during the day?

Is it 60 miles from one sign of civilisation (i.e. petrol station, town, etc.) and another ... and in between there's absolutely nothing?
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Old 07-08-10, 07:13 AM
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Nearly a liter an hour in no wind conditions. Should be plenty considering the temperature. Be well hydrated before you start each day.
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Old 07-08-10, 07:27 AM
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Originally Posted by Machka
Is it 60 miles from one sign of civilisation (i.e. petrol station, town, etc.) and another ... and in between there's absolutely nothing?
Nothing but Kangaroos & Koalas.
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Old 07-08-10, 07:42 AM
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In those conditions, my guideline would have been about 1 liter/20km plus two liters for an overnight - so a little more than you will carry. I cycled around Australia and in outback regions I was typically carrying 8-11 liters, though rarely used that much.
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Old 07-08-10, 08:01 AM
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for desert riding and camping I would carry a ten liter bladder for water, fill it at your afternoon water stop if you know you have one.

This frees you up from having to camp near water sources and adds great flexibility in this regard for the next morning.

You are good to go for the start of the day with a good supply.
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Old 07-08-10, 08:16 AM
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3+ liters should easily be enough for the ride at those temps, assuming little climbing or radical headwinds.

Having run short in the past, I'd probably add at least another liter for unforeseen circumstances, such as a mechanical failure that forced me to push the bike.

On another note: I've carried a two liter bottle on my rear rack and didn't care for the way the water movement affected bike handling when the bottle was less than full. I changed to a 3 liter Camelbak bladder stowed in a pannier and filled to the amount I thought necessary for that leg of the trip and liked that much better. Additionally, I could pull off the mouthpiece and use the hose to fill my bottles thru siphon action while the bottles remained in their cages.
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