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Riding a bike after a 40mph crash

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Riding a bike after a 40mph crash

Old 06-12-19, 01:28 PM
  #26  
TimothyH
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Originally Posted by PepeM View Post
I would ride it like I stole it.
Steal is real.


-Tim-
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Old 06-12-19, 01:42 PM
  #27  
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Originally Posted by CliffordK View Post
I think that would be my first question.

Running into something solid like a car pulling out in front of you could be a cause for significant concern.

On the other hand, a bike sliding out from under one on a corner might be less worrysome, and one might go by the actual condition of the bike.

Anything else would lie somewhere in the middle between the two extremes.
+1 Sliding off the road on a corner after hitting some gravel and ending up with an acre of road rash, scraped handlebars, brake levers, downside pedal and corner of seat - bike would be just fine (and in my tight-money racing days, considered a crash well done).

Ben
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Old 06-12-19, 02:03 PM
  #28  
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Originally Posted by 79pmooney View Post
+1 Sliding off the road on a corner after hitting some gravel and ending up with an acre of road rash, scraped handlebars, brake levers, downside pedal and corner of seat - bike would be just fine (and in my tight-money racing days, considered a crash well done).

Ben
That would be fine with steel, I wouldn't trust carbon though.
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Old 06-12-19, 02:26 PM
  #29  
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Originally Posted by Caad12 View Post
Just curious how safe would you feel riding an aluminum frame bike with a carbon fork that was involved in a high speed crash (40 mph)?

I cannot tell if the frame is bent or the damage on the carbon fork. I have heard horror stories of carbon failing after crashes and I no longer trust the frame or fork. I do not want to ride and I certainly do not feel comfortable giving it to someone else. I would love to know the groups thoughts continuing to use this bike.

Thanks
The only way to tell if the carbon fork is damaged, (other than obvious visual proof), is to have it X-rayed. As far as the Aluminum frame, generally speaking, what you see is what you get. So if after close inspection there is a decent possibility it is not seriously damaged. But there are no guarantees.

If you X-ray the fork and it is fine but you have doubts about the aluminum frame, one option is to get a new Aluminum frame compatible with your fork, drivetrain, etc and transfer on to the new frame.
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Old 06-12-19, 07:30 PM
  #30  
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Originally Posted by Caad12 View Post
Just curious how safe would you feel riding an aluminum frame bike with a carbon fork that was involved in a high speed crash (40 mph)?

I cannot tell if the frame is bent or the damage on the carbon fork. I have heard horror stories of carbon failing after crashes and I no longer trust the frame or fork. I do not want to ride and I certainly do not feel comfortable giving it to someone else. I would love to know the groups thoughts continuing to use this bike.

Thanks
OP, you put this in a thread in the Bike Mechanics section about bent spokes in your wheel. Were you or the car going 40 mph?

This brings me to my next question. I have an insurance adjuster visiting tomorrow morning to assess the damage of my bike. I am afraid he is only going to compensate me for a new wheel, brake, seat, and labor costs. What concerns me is I was hit at a high rate of speed (40mph) and I no longer trust the frame and especially the carbon fork.
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Old 06-13-19, 11:41 AM
  #31  
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Originally Posted by Rogerogeroge View Post
I am afraid he is only going to compensate me for a new wheel, brake, seat, and labor costs. What concerns me is I was hit at a high rate of speed (40mph) and I no longer trust the frame and especially the carbon fork.
You could not be hit by a vehicle going that fast and survive. It simply is not possible. Regardless, we have no standing in your claim. This is between you and them. If there is 'any'. I really mean 'any' damage at all to the front wheel then the fork should also be suspect. I would expect the adjuster to know that. You are second guessing them. Swapping a fork is not a trivial operation. Just like cars: the whole is greater (much) than the sum of its parts thereof. I DOUBT the insurance company is going to part out your bike and pay your claim based on the going price of the damaged components. Your bike will very likely be 'totaled'.
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Old 06-13-19, 12:55 PM
  #32  
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Originally Posted by Leisesturm View Post
You could not be hit by a vehicle going that fast and survive. It simply is not possible. Regardless, we have no standing in your claim. This is between you and them. If there is 'any'. I really mean 'any' damage at all to the front wheel then the fork should also be suspect. I would expect the adjuster to know that. You are second guessing them. Swapping a fork is not a trivial operation. Just like cars: the whole is greater (much) than the sum of its parts thereof. I DOUBT the insurance company is going to part out your bike and pay your claim based on the going price of the damaged components. Your bike will very likely be 'totaled'.
Depends on what being hit means for you. Years ago I was hit by a car going about that speed and survived. The driver was drunk and zig-zagging, going in the same direction as I, hit me sideways and sent me flying. Had a concussion, broken scapula and lots of road rash (wasn't wearing a helmet). My steel frame had a bent seatstay, I cold straightened it out and still rides OK.
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Old 06-13-19, 10:10 PM
  #33  
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Originally Posted by Leisesturm View Post
You could not be hit by a vehicle going that fast and survive. It simply is not possible. Regardless, we have no standing in your claim. This is between you and them. If there is 'any'. I really mean 'any' damage at all to the front wheel then the fork should also be suspect. I would expect the adjuster to know that. You are second guessing them. Swapping a fork is not a trivial operation. Just like cars: the whole is greater (much) than the sum of its parts thereof. I DOUBT the insurance company is going to part out your bike and pay your claim based on the going price of the damaged components. Your bike will very likely be 'totaled'.
Getting side-swiped and T-boned are two different things. We need to hear the whole story. Lots of speculation on the internet.
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Old 06-13-19, 10:14 PM
  #34  
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Originally Posted by Leisesturm View Post
You could not be hit by a vehicle going that fast and survive. It simply is not possible. Regardless, we have no standing in your claim. This is between you and them. If there is 'any'. I really mean 'any' damage at all to the front wheel then the fork should also be suspect. I would expect the adjuster to know that. You are second guessing them. Swapping a fork is not a trivial operation. Just like cars: the whole is greater (much) than the sum of its parts thereof. I DOUBT the insurance company is going to part out your bike and pay your claim based on the going price of the damaged components. Your bike will very likely be 'totaled'.
And by the way, I trust my judgement in this matter much more than an insurance adjuster. If I'm in doubt, I'll reach out to others that can answer. Unless we're talking bodily damage with $$$ implications, an insurance company isn't going to x-ray a carbon fork. And swapping a fork is a trivial operation. You are correct that the bike will most likely be 'totaled'.
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Old 06-13-19, 10:17 PM
  #35  
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Originally Posted by Leisesturm View Post
You could not be hit by a vehicle going that fast and survive. It simply is not possible.
A friend of mine was going almost 40 when an oncoming car turned left into him. He survived, and fully recovered within a few months. It's possible, even in a head-on situation.
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Old 06-14-19, 12:16 AM
  #36  
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Originally Posted by Rogerogeroge View Post
A friend of mine was going almost 40 when an oncoming car turned left into him. He survived, and fully recovered within a few months. It's possible, even in a head-on situation.
I think totally possible, especially if the rider is being flipped/thrown over and not actually impacting the vehicle, there will be pain though. Watch some you tube videos
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Old 06-14-19, 12:38 AM
  #37  
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The one thing I think I can say with confidence is that the rider on a bike that wipes out for whatever cause at 40 mph isn't going to have a clear idea of just how the bike was impacted. That's a lot of energy being dissipated in a lot of directions very fast. In other words, bike and rider are bouncing around off of anything that hit them, anything they happen to hit, the ground and each other, the worst impacts occurring in a fraction of a second.

40 mph isn't a magic figure, but there's nothing irrational in believing that the likelihood of hidden damage is really quite high at that speed.
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Old 06-16-19, 06:47 PM
  #38  
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Originally Posted by Caad12 View Post
Just curious how safe would you feel riding an aluminum frame bike with a carbon fork that was involved in a high speed crash (40 mph)?

I cannot tell if the frame is bent or the damage on the carbon fork. I have heard horror stories of carbon failing after crashes and I no longer trust the frame or fork. I do not want to ride and I certainly do not feel comfortable giving it to someone else. I would love to know the groups thoughts continuing to use this bike.

Thanks
Depends. If it was an open road tumble, the frame is likely fine, with damage to the components that hit the ground...pedals, brake levers etc...

If there was direct impact with something solid, then it's harder to judge.

I have had quite a few race speed crashes with plenty of component & wheel damage. the worst frame damage was a broken RD hanger.
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Old 06-16-19, 08:27 PM
  #39  
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Originally Posted by mcours2006 View Post
That's a pretty high-speed crash., but I suppose it depends on how the crash occurred and what kind of impact the frame/fork actually took. There may be damage to the frame/fork that you cannot see, but are nonetheless there. No way to tell without specialized equipment. If it were me I wouldn't be comfortable riding it, and even less so giving it to someone else to ride.
You really don't need a slide rule to know the structural integrity has been comprised. Steel, maybe? But only because it doesn't fail catastrophically. Otherwise, that bike is toast.
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Old 06-16-19, 09:24 PM
  #40  
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FWIW, I once went off the road into a low soft muddy berm. Bike stopped in zero distance and the fork folded back so the tire hit the frame. The frame tubes buckled at the lugs of the head tube. I doubt I was going more than maybe 10 mph. It's all about the forces, not the speed.
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