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Does rain make you faster?

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Does rain make you faster?

Old 06-03-10, 10:51 AM
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Brightwork
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Does rain make you faster?

After it stopped raining yesterday, I decided to go for a ride. After 1 mile, I figured out it only "paused". After 2 miles I was soaked and kept riding for 25k in the pouring rain.

I don't have a PT, but 20mph "felt" easier than it did 2 hours earlier, when I only got 5 miles in before the rain came. I normally don't eat much before riding but this time I had fresh prosciutto stuffed pasta with chicken,cheese and pesto 45-60 minutes earlier.

Factors:
Raining
Michelin Pro Race 3 @ 105psi
5 mile ride "at a medium pace" 2 hours earlier
50k ride each day for the two days prior
25k-50k every day or two normally.
750 calories consumed 1 hour before ride

Does the rain make you that much faster from less rolling resistance or do I just need a warm up ride and warm up snack?
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Old 06-03-10, 10:52 AM
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If there is lightning with the rain.....
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Old 06-03-10, 10:52 AM
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rain lowers tire friction.
you probably had a tail wind, since rain usually equates to more wind and storms.
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Old 06-03-10, 10:53 AM
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I ride in the rain all the time here in Portland. It doesn't make me faster at all. I'd say slower.
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Old 06-03-10, 10:54 AM
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No.

Originally Posted by AEO View Post
rain lowers tire friction.
Huh?
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Old 06-03-10, 10:55 AM
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rain makes me slow to a crawl and yell a lot.
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Old 06-03-10, 10:56 AM
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Tire friction is needed for traction. If you lower it then you would go slower.

Now rolling resistance is different
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Old 06-03-10, 10:58 AM
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Originally Posted by mwchandler21 View Post
Tire friction is needed for traction. If you lower it then you would go slower.

Now rolling resistance is different
Huh?
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Old 06-03-10, 11:02 AM
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Originally Posted by Brightwork View Post
"at a medium pace"
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Old 06-03-10, 11:12 AM
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Originally Posted by Tulex View Post
If there is lightning with the rain.....
That was my first thought when trying to figure out why I was faster. Very little wind on the ride. When I stopped at the lights, if anything, it was a light headwind. I couldn't find anything on rolling resistance in wet vs dry but can't imagine it was all motivational that made me faster.
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Old 06-03-10, 11:13 AM
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Originally Posted by AEO View Post
rain lowers tire friction.
I remember a thread about this a while ago. I can't find it again, though. It seemed inconclusive.
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Old 06-03-10, 11:13 AM
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Is that actually him singing all of that?
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Old 06-03-10, 11:14 AM
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Originally Posted by NickDavid View Post
I like to put Easter eggs in my posts. 5 points for you!
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Old 06-03-10, 11:18 AM
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maybe it's the cooling effect of the rain that gives you some extra juice
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Old 06-03-10, 11:20 AM
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I would have to imagine that any gain you get due to the reduction in rolling resistance would be negated, or nearly so, by having to break the bonds between the water molecules to release the tire from the wet surface. Or maybe not.
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Old 06-03-10, 11:23 AM
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Originally Posted by pawnii View Post
maybe it's the cooling effect of the rain that gives you some extra juice
That's what I was thinking. You probably stayed cooler during the ride. Also a tailwind may be a factor.

Riding in the rain doesn't really slow me down or make me faster. The only time I get slowed down is on sharp turns where I'd have to slow down my speed or railroad tracks. It was pouring rain on this group ride for the first hour, then dry the last hour. The average speed was still what it would normally would be.
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Old 06-03-10, 11:39 AM
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I don't notice any difference but I do take turns more slowly. If it is really really raining I have allow for longer breaking distances so that also slows me down.
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Old 06-03-10, 11:40 AM
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I would agree that it's probably a combination of the wind and how hot you feel.

Around here it can be humid and miserable before the rain. Your body can't put out as much power when you're overheated like that. The rain can be nice and refreshing and brings your core temperature down.
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Old 06-03-10, 11:44 AM
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Maybe people just ride faster to get out of it. Or maybe the rain sucks more than the effort, so you don't notice the effort as much.
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Old 06-03-10, 11:53 AM
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It's probably because you're typically dehydrated. Humans are directly related to squids. Water is direcly absorbed by skin through osmosis.
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Old 06-03-10, 12:12 PM
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on an unrelated aspect, i tend to push it a lot harder in the rain. just seems fun.
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Old 06-03-10, 12:15 PM
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It's a mental thing, but yeah, I go faster in the rain. I really love riding in the rain...
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Old 06-03-10, 12:46 PM
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Rain makes me wanna go home faster.
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Old 06-03-10, 12:53 PM
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I generally don't push as hard when it is raining unless it has just started and I'm trying to beat it home.
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Old 06-03-10, 01:41 PM
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rain slows me down on a bike but I run faster.
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