Tulex

Rain makes corn, corn makes whiskey......

AlexTaylor

Rain increases the amount of oxygen in the air...

Brightwork

If that's true, it would make sense.

coasting 

rain makes the ground all slippery. i'm a big chicken.

Tsuru

RAIN DOPING********** I knew it!

AEO

scroll down a bit and you'll see wet concrete and tarmac/asphalt have lower friction coefficients than when dry.

https://www.engineershandbook.com/Tab...efficients.htm

if you want to go REALLY fast, then ride the white line when it's raining or wet.
Just don't jam on your brakes.

Brightwork

I have noticed the white line is "faster", but I always thought the paint kept the road from chipping away so it was like "new" pavement. Your table is for coefficient of static and kinetic friction - not sure if it translates directly to rolling resistance. It may, I'm just not sure.

I did get cut off in the rain, while going through 1/2" of water yesterday - didn't think I would be able to stop in time.

chains1240

I laughed out loud on that one.

Garfield Cat

Runners really benefit when there's like a nice drizzle. It does get the core temps down and makes you more likely to run faster. I can see that happening for cyclist too. If the drizzle gets too heavy, it might turn against the runner. Even running at a 5 minute mile pace, the drizzle in the face feels refreshing. I can't say the same thing for a cyclist going 20 mph plus. The drizzle might become annoying, fogging up the glasses and jersey sticking to the skin, shorts feeling like you just pee in the pants.

Phil85207

Maybe its because some days you have it, and some days you don't.

shouldberiding

I just love how smoooooth the pavement feels when it's wet. Makes me want to push harder. In that way I'm faster.

gcasillo

..

mwchandler21

Basically the maximum tractive force you can generate is equal to the weight on the back wheel times the coefficient of static friction. If the pavement is wet then this is lowered.
Rolling resistance is one of the largest force preventing you from going forward and is basically the weight on both wheels times the coefficent of rolling friction, which would also be lowered if the road is wet.
Mostly the changes in these factors would probably cancel out.

AEO

oh, it's smooth alright.

But if you've ever tried going up or down a set of wooden stairs in the rain, you'd realize low grip is not fun.

spry

After you kiss the wet pavement and "Gary Busey"your head to the curb you'll be going faster.
Faster in an ambulance to the ER.

Pour old motor oil on your route to really obtain fasterno friction to hold you back.

spry

This is the only usefull substance in this thread.
Whiskey indeed did make my girlfriends faster (back in the day)

AEO

less injuries in rain, since you just skid on the road instead of getting road rash.

stevegor

Strangely, I find I get wet when I ride in the rain....

gregf83 

That explains why you can't corner as quickly in the rain but it has nothing to do with the OP's question. Friction is not related to rolling resistance.

dahut

Getting back through the rain feels like more of an accomplishment,so you feel like you've done more than the usual.

Brightwork

I asked a friend of mine tonight who knows a lot about the subject, he said, "Dude, you just wanted to get the f*** out of the rain." I'll try the same route in the next few days when it's dry and I've had the same fuel. I'll compare Garmin files and see what's up.

Brightwork

I have. I agree. For bonus points, try a cedar deck in the winter.