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It started raining, what do I do now?

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Old 10-06-10 | 04:58 PM
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It started raining, what do I do now?

I have been commuting for about 2 months, and have enjoyed it thoroughly. Today it is raining. I don't have a problem getting wet, but was wondering if there were any safety issues with riding on racing slicks, I have Ritchey race slick tires (700 x 23). I don't want to start home and realize I am going to most likely eat **** at some point. The rain is light, but there will be a nice slick surface on the road.

Is this going to be dangerous with my tires? or should I be OK if I ride cautiously
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Old 10-06-10 | 05:07 PM
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The typical bike tire can't hydroplane until over 100 MPH, so you don't have to worry about that part.

Just be careful with the reduced grip of wet roads. Painted and plastic road markings, tar strips, and metal are especially slippery, as are wet leaves in the road. Brake earlier to clear the rims too.
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Old 10-06-10 | 05:09 PM
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Pros race in the rain with race slicks.. just sayin..
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Old 10-06-10 | 05:25 PM
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Originally Posted by tsl
The typical bike tire can't hydroplane until over 100 MPH, so you don't have to worry about that part.

Just be careful with the reduced grip of wet roads. Painted and plastic road markings, tar strips, and metal are especially slippery, as are wet leaves in the road. Brake earlier to clear the rims too.
+1

Your best option for normal but wet roads is getting tires with a slick (no tread features) tire with a grippy compound. As for paint, man-hole covers, gratings..... listen to tsl.... he knows what he speaks of.

Or, you can listen to Sheldon Brown:

Tread for on-road use
Bicycle tires for on-road use have no need of any sort of tread features; in fact, the best road tires are perfectly smooth, with no tread at all!


Unfortunately, most people assume that a smooth tire will be slippery, so this type of tire is difficult to sell to unsophisticated cyclists. Most tire makers cater to this by putting a very fine pattern on their tires, mainly for cosmetic and marketing reasons. If you examine a section of asphalt or concrete, you'll see that the texture of the road itself is much "knobbier" than the tread features of a good quality road tire. Since the tire is flexible, even a slick tire deforms as it comes into contact with the pavement, acquiring the shape of the pavement texture, only while in contact with the road.

People ask, "But don't slick tires get slippery on wet roads, or worse yet, wet metal features such as expansion joints, paint stripes, or railroad tracks?" The answer is, yes, they do. So do tires with tread. All tires are slippery in these conditions. Tread features make no improvement in this.
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Old 10-06-10 | 05:40 PM
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biking in the rain on Bontrager Racelite slicks, 700X25
#!
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Old 10-06-10 | 05:44 PM
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Just be more vigilant, and get most of your stopping power from the front wheel. Paint or metal in the road will make your tires slide - it can be effectively the same thing as hydroplaning. If you go over a metal slab, keep in a straight line, and don't brake until you get to the other side.
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Old 10-06-10 | 05:49 PM
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Thanks for the advice guys.
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Old 10-06-10 | 05:50 PM
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If this is the first rain in months, be very careful of oil that seeps up from the asphalt, particularly at intersections. You should be fine, just take it easy.
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Old 10-06-10 | 05:56 PM
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You could always use a bit less pressure in your tires for a larger footprint on the pavement.
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Old 10-06-10 | 05:56 PM
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Beyond all the advice, I actually enjoy riding in the rain, once I'm out and in it..... unless it's below 40 degrees, then it can get a bit miserable.
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Old 10-06-10 | 07:52 PM
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Originally Posted by tsl
The typical bike tire can't hydroplane until over 100 MPH, so you don't have to worry about that part.
At one point I figured out that you could potentially hydroplane on ~30 psi tires if you got up to around 40 or 45 mph. That's unlikely to happen.
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Old 10-06-10 | 08:05 PM
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Hydroplane on a bicycle tire and you'd be on your butt quick... thankfully you have to be going very fast! What is more dangerous is rain washing away all the micro-grit that gives your bicycle tire grip. Usually road paint, sewer grates and street-car tracks are gonna get ya!
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Old 10-06-10 | 09:36 PM
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I've often heard the argument that bike tires can't hydroplane. That's all well and good, but is hydroplaning the only cause of a tire slipping? I honestly don't know, but I doubt it. It seems like debunking hydroplaning is a bit of a straw man argument, people don't care how they go down in the rain, just whether or not they do.
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Old 10-06-10 | 09:45 PM
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Originally Posted by Arcanum
At one point I figured out that you could potentially hydroplane on ~30 psi tires if you got up to around 40 or 45 mph. That's unlikely to happen.
I would consider this an arcanum. And also likely to give yourself a severe charley horse.
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Old 10-06-10 | 10:14 PM
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Originally Posted by cooleric1234
I've often heard the argument that bike tires can't hydroplane. That's all well and good, but is hydroplaning the only cause of a tire slipping? I honestly don't know, but I doubt it. It seems like debunking hydroplaning is a bit of a straw man argument, people don't care how they go down in the rain, just whether or not they do.
I think you're right.

Like most people in this thread have pointed out, anything other than pavement ( or dirt ) is dangerous when things get wet. Metal grating means your tires have very little traction, and could lose their grip if you messed up. Same with paint, like road striping. Or leaves on the edge of the road. Or even some pavement - stuff you're more likely to find in urban parks where bikes shouldn't be anyway. Watch out for all of this stuff. Don't turn too steeply here.

I've locked my rear wheel a couple of times when it was wet and I had to make panic stops. The back wheel starts to slide sideways in an arc ... it's scary for a split second, until you let up. Rely mostly on the front brake; the weight moving forward as you stop keeps the tire pressed up against the roadway.

This is probably obvious, but don't lean as far into turns because you have less contact area with the road this way, and your tires already have less grip.
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Old 10-06-10 | 11:16 PM
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Now on to the part about not getting too wet, right?
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Old 10-07-10 | 11:47 AM
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Old 10-07-10 | 11:58 AM
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And avoid puddles, they may be hiding unpleasant surprises!

For not getting wet in cold temps it's hard to beat Pearl Izumi's Amfib tights and bibs. O2 rain shells are cheap and effective for the upper body. Columbia hiking outerwear is also good and they often have sales or look for an outlet shop.
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Old 10-07-10 | 12:27 PM
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Rain is great riding, but you do have less grip. I've never fallen due to rain, though, and it's unlikely you will. Slicks are actually better in rain because they give you more contact surface. I have skidded my rear tire on a couple of occasions, but it's easy to recover from a fishtail.

Go slow on corners, and give yourself lost of braking distance. Enjoy.
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Old 10-07-10 | 01:02 PM
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Just be more cautious when riding in the rain.
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Old 10-07-10 | 01:19 PM
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Painted and plastic road markings, tar strips, and metal are especially slippery, as are wet leaves in the road.
This is great advice. When riding on wet roads, try not to roll over anything that isn't asphalt.

Beyond all the advice, I actually enjoy riding in the rain, once I'm out and in it..... unless it's below 40 degrees, then it can get a bit miserable.
Funny, that's when I enjoy riding in the rain the most because I can wear as much as I want and not get too hot or wet. I dislike summer rain the most because anything that will protect against the rain will be too hot, so my only option is to get wet, which I don't like.
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Old 10-07-10 | 01:48 PM
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Here is some bonus seasonal advice, never turn or brake on wet fallen leaves!!
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Old 10-07-10 | 01:57 PM
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Originally Posted by cooleric1234
I've often heard the argument that bike tires can't hydroplane. That's all well and good, but is hydroplaning the only cause of a tire slipping? I honestly don't know, but I doubt it. It seems like debunking hydroplaning is a bit of a straw man argument, people don't care how they go down in the rain, just whether or not they do.
The Michellin web site, clearly posts that Hydroplaning is not a problem with bike tires... but as you note, things can get slippery. The problem is that knobby tires are worse than slicks on normal roads. At the end of the month I'll be switching over to my Nokia W109's. I can tell you that I can notice that they have less grip on dry and rainy days than my slicks. Once the snow comes out, the Winter tires are infinitly better with gripping in a few inches of snow. A slick tire would get no grip, but I can power my way throught he snow. On icy roads, the carbite steel studs dig in and give me far more traction and grip than I'd have trying to walk. I can always tell in winter when I am hittting black ice, because my tires get quiet. As other pointe dout painted lines, and steel cover plates are probably the greatest risk, as these can be slick as snot. Just be sure to go easy in the rain.

Happy riding,
André
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Old 10-07-10 | 01:59 PM
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I love riding in the rain. It's sort of a small yet welcome challenge. Heed the advice posted above. It's all good.
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Old 10-07-10 | 02:10 PM
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+1 Slow down
+1 Slicks
+1 Fenders
Disk brakes are also great and grippy tires. I had some Armadillos that slid all around, but my Marathon Supremes get good grip on wet pavement.

AND, you really don't want to change a tire in the rain, so I'd make sure I had some decent flat protection
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