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Did my bike cause my crash?

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Old 03-22-12 | 01:50 PM
  #26  
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From: Lincoln, NE

Bikes: Versato Riviera 21spd cruiser, 2005 Schwinn Typhoon cruiser 700c wheels, Ocean Pacific cruiser 6spd suicide front brake, 1993 Giant Acapulco SS conversion project

i like potato chip for the shape of that wheel. i resurve taco for more dramatic bent wheels.

i dont like the pringle thing... its like people that call all cotton swabs q-tips
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Old 03-23-12 | 10:21 AM
  #27  
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Thanks everyone

Thanks for all the reply's, it has given me some comfort to understand what most likely happened , although I am a little ashamed that it was most likely user error. I am 21, I learnt to ride 2-wheel at 5 and had been frequently riding for the last 2 years, I had thought myself more experienced but apparently not.


For additional information:

This happened on my ride to school that I had done more than 50 times before, it was a dry and frosty morning so I suspect no slippery surface at play. And I was braking less because of the speed of the turn and more because of the upcoming hazards (3 foot gap between 2 polls). It sounds like the braking caused my weight distribution to be off and caused the 'high sided' flip.

Below is a map of where the accident occurred, you can see the long straight where I gained too much speed, the long sweeping turn and the turn that caused the crash.
[Also that I had an option to turn the wrong way and let my speed die down and I didn't take it .]

https://tinyurl.com/7ce4zc7

For the record, I was using both brakes, I believe my rear wasn't responding as fast as the front and I likely increased my braking on both to compensate. Also I fully intend to get back on the bike, when my mother allows me to in 2013
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Old 03-23-12 | 01:30 PM
  #28  
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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Thanks for the follow up. It sounds like you're on the way to a recovery and soon t.his will just be a story you tell friends. Hopefully your mom won't become more of a worrier about bikes and won't delay your return to two wheels.

I looked at the route map. Did you crash on the hard right turn at the very end? If so it's not surprising. One thing we didn't discuss is the minimum radius bikes can turn. As the bike is leaned into a turn, the steering geometry changes and the minimum turning radius increases. You can see this effect (when your bike is back together) by holding up the bike and walking it in a sharp turn. When you lean it over the minimum turning radius (regardless of speed) will be much bigger.

If you enter a turn too fast, the bike won't be able to make it no matter what you do, but it's a question of where your center of gravity is. If to the low side the bike will slide out and you'll get road rash, but as you now know first hand, too high and the bike bites and flips to the outside.

Because of minimum radius issues, hairpins at any decent speed need to be managed properly and it's imperative that you scrub off speed before entering them. The problem is that when the hairpin is at the end of a series, it can be hard to find a place to safely scrub off the speed between the turns, and a small miscalculation can lead to an unavoidable crash.
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