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I Crashed.

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Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

I Crashed.

Old 03-07-10, 10:16 PM
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I Crashed.

I need some help with a problem I am having. Recently, I crashed while riding my bicycle down a hill I have descended at least 90 times. I was about 15 minutes into my ride when I was approach the bottom of the hill with a left to right curve. I was traveling approximately 20 - 25 mph. All of a sudden I felt my rear wheel sliding out from under me and the bicycle going down. The crash broke two of my ribs and induced a pneumothorax in my right lung. I have been riding for over 20 years and have in excess of 10,000 miles of experience. However, I cannot for the life of me figure out what happened. The roadway was slightly wet but no different then a dozen or so times before. I did not see any grease spots, although there was extensive sealant in the area of the crash from prior road repairs. I was riding on Specialized 700c-25 tires @ 120psi. Approximately 300-400 miles of wear. Any hypothesis on what caused this loss of traction?
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Old 03-07-10, 10:19 PM
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Taking the curve at a high speed.
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Old 03-07-10, 10:22 PM
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Did you flip out and brake?
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Old 03-07-10, 10:24 PM
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Welcome to Bike Forums!
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Old 03-07-10, 10:29 PM
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^ +1

Also:
Pressures too high on tyres? ie too little contact patch

Just because you couldn't see an oil patch or so on after the fact doesn't mean that there wasn't a film of something down there.
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Old 03-07-10, 10:35 PM
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too high speed, too high tire inflation, too much lean, too much braking, turning weird, black ice, gravel, slick pavement (sealant), out of practice from winter, sand, wet pavement?
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Old 03-07-10, 10:51 PM
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evil road gnomes?
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Old 03-07-10, 11:02 PM
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was the road wet from the first rain in awhile? In this case there was likely oil on the road.

If the back tire was unweighted, and went over something slick as you were leaning it might have been enough to get it to break free. Hitting the rear brake in this circumstance just guarantees you'll continue the slide. When panic-stopping, which hand do you instinctively grab? If it's the right, you probably locked it when you sensed something amiss and then it was game over.
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Old 03-07-10, 11:32 PM
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Any chance you were passing over some painted road marker? Pedestrian crossing, turn lane arrow, etc?

Those things can be slick as crap where I live. Especially if they're wet at all.
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Old 03-07-10, 11:36 PM
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120psi might've been a bit much for the wet if you're not a pretty big guy.
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Old 03-08-10, 12:13 AM
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20 years and you've only ridden 10,000 miles???
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Old 03-08-10, 12:38 AM
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Originally Posted by umd
20 years and you've only ridden 10,000 miles???
More then average American. *shrug
Anyway I am with kudude tire probably lost a bit of traction you grabbed the brakes maybe not even realizing and well we know what happened next.
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Old 03-08-10, 12:40 AM
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Originally Posted by umd
20 years and you've only ridden 10,000 miles???
wow thats a whole 500 miles / year .

25c tires @ 120 psi is wayyy overkill
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Old 03-08-10, 12:53 AM
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not enough weight on your outside pedal
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Old 03-08-10, 01:16 AM
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Same thing happened to me a while ago on the way to school on my road bike. I went to do a sharp left handed turn and the back wheel hit those things that mark lanes and got some air and sent me into a slide. Thank goodness I hit the front brake and stopped the slide in someway, otherwise I was headed straight for a pole. Anyway, did you happen to hit one of those little marker thingys?
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Old 03-08-10, 01:19 AM
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Originally Posted by UmneyDurak
More then average American. *shrug
It's just a funny thing to say... it seemed like he was trying to show how experienced he was...
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Old 03-08-10, 01:22 AM
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Hit the rear brake too hard? Rear wheel likes to lock up when traction isn't 100%
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Old 03-08-10, 01:25 AM
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Originally Posted by umd
It's just a funny thing to say... it seemed like he was trying to show how experienced he was...
Maybe he was just trying to say he wasn't some shlub out for a weekend ride?
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Old 03-08-10, 01:36 AM
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Originally Posted by rhinot
Maybe he was just trying to say he wasn't some shlub out for a weekend ride?
Well with 10k miles in 20 years it comes to 500 miles a year, 41 a month....
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Old 03-08-10, 01:41 AM
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Just help the guy out.

****.
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Old 03-08-10, 01:44 AM
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I think other people have it covered. I just thought it was an interesting thing to say, the way he said it. You guys are making a bigger deal out of it than I was.
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Old 03-08-10, 01:54 AM
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You crashed, **** happens when you party naked, stop looking for something to blame it on and don't do it again. Hope you heal up fast, sincerely.

Oh, and welcome to Bike Forums.
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Old 03-08-10, 01:57 AM
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Maybe braking at an inopportune time when some gravel was present.
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Old 03-08-10, 02:46 AM
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Given that he reckons it happened all of a sudden and he can't figure it out, I gather he wasn't on the brakes.
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Old 03-08-10, 02:57 AM
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As others have said - that's pretty high pressure for 25c's - maybe your wheel caught a stone? At high speed and tyre pressure that could flip your wheel. Falls happen - don't beat yourself up about it, you can never account for every eventuality and all it takes is a split second of lapsed concentration at the wrong time..?
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