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Very Hot Topic (More than 25 Replies) Death Wobble (Read 3028 times)
EAutry
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Death Wobble
06/16/14 at 2:54pm
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I had this happen to me yesterday on the road bike going into a turn at 35+ mph. You can Google the science behind the cause, but your bike basically gets the perfect frequency to almost turn it into a tuning fork, and your front end goes into an uncontrollable wobble. Happens on motorcycles also. Flyinelvis had this happen to him not long ago, so I remembered the tip of laying my leg across the top tube to dampen the frequency. It worked perfectly and saved me from what could have been a bad crash. I almost shat a cat!

Posting here so folks know about it if it happens to you.
  
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One gear really is enough..but my knees have forced me to go 1x10.
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isitwinteryet
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Re: Death Wobble
Reply #1 - 06/16/14 at 3:10pm
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all the time on the skateboard!  weeeeeeeeeeeeeeeeeow
  
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SCOTT_T
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Re: Death Wobble
Reply #2 - 06/16/14 at 3:45pm
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I had it happen too me...........on a steel road bike, I could actually feel it starting and the bike would shimmy enough you could see the bb moving, after the 3rd time I sold that SOB.
  
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Enoch
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Re: Death Wobble
Reply #3 - 06/16/14 at 4:34pm
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I had it happen to me decending Mitchel @ around 45 mph and on 181 last week. Mine was not bike related. It seems I get a little nervous and the adrenaline gets to me on REAL long and FAST decents. So I get a mild case of the shakes.  All I can do is bring it to a stop and take some deep breathes. Scarey Stuff.
  
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Do what you like. Stop hating people for their riding habits and get back to hating them for their skin color, religion, politics, and sexual orientation.
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StretchASU
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Re: Death Wobble
Reply #4 - 06/16/14 at 5:54pm
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Scary enough when it hit unexpectedly in my last rock crawler with a cage around me...cant imagine it on a freakin bike.
  
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madss
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Re: Death Wobble
Reply #5 - 06/16/14 at 5:59pm
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happened to me at the Velodrome in the high bank as I was doing a flying 200, speed was around 40 and I called it a day once it got under control. Never took the rental out again, bought my own after that experience.
  
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mlong623
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Re: Death Wobble
Reply #6 - 06/17/14 at 2:57pm
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isitwinteryet wrote on 06/16/14 at 3:10pm:
all the time on the skateboard!  weeeeeeeeeeeeeeeeeow


Quoted for truth.
I've had a few downhill skate sessions end cause of that lol
  
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Vasco
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Re: Death Wobble
Reply #7 - 06/17/14 at 4:05pm
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SCOTT_T wrote on 06/16/14 at 3:45pm:
I had it happen too me...........on a steel road bike, I could actually feel it starting and the bike would shimmy enough you could see the bb moving, after the 3rd time I sold that SOB.


Was that on the Ibis?
Doug S.
  
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SCOTT_T
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Re: Death Wobble
Reply #8 - 06/17/14 at 4:09pm
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yup.......
  
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Vasco
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Re: Death Wobble
Reply #9 - 06/17/14 at 7:17pm
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I always liked that bike. It had a nice ride and was comfortable. No frame wobble for me.
Doug S.
  
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IntheBush
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Re: Death Wobble
Reply #10 - 06/18/14 at 10:13am
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mlong623 wrote on 06/17/14 at 2:57pm:


Quoted for truth.
I've had a few downhill skate sessions end cause of that lol


Tighten up your truck kingpin.

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Re: Death Wobble
Reply #11 - 06/20/14 at 6:14pm
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Definitely happens on motorcycles.  I had it happen on a CBR600 at about 85 mph.  Scary stuff.  Sold the bike not long after while I still had my skin.
  
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Re: Death Wobble
Reply #12 - 06/20/14 at 7:47pm
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Only descending on a road bike in the cold.  I get a shiver that makes its way to the front wheel.  For awhile I thought it was the bike
« Last Edit: 06/20/14 at 7:50pm by dwright »  
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Re: Death Wobble
Reply #13 - 06/20/14 at 8:22pm
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Longer, lower stem will help.  

Fast motos have clip ons and steering dampers for a reason.
  
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Re: Death Wobble
Reply #14 - 06/20/14 at 8:29pm
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Moar like it
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Re: Death Wobble
Reply #15 - 06/20/14 at 8:50pm
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dwright wrote on 06/20/14 at 7:47pm:
Only descending on a road bike in the cold.  I get a shiver that makes its way to the front wheel.  For awhile I thought it was the bike



this, and I usually only experience it when descending Mitchell, swore it was the bike until Enoch enlightened me
  
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Tom F
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Re: Death Wobble
Reply #16 - 06/20/14 at 11:25pm
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Saw a fellow on a nitro powered drag bike go into a wobble at about the 1000 foot mark and rode out all the way through the taps. He went across the strip and into the grass and back onto the asphalt in the shut down area. How he stayed upright I will never know. It took a long, long time for him to come down the return road. Figure he was trying to remove the leathers from his nether regions.
  
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Re: Death Wobble
Reply #17 - 06/21/14 at 1:02am
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Just read alot about this. I'm guessing this only occurs on extremely long descents? Not necessarily shorter downhills like around here? I get the weight shift and knee on the frame to dampen and change the oscillation point but loosening the grip? Looks like to me the less grip on the bars would just invite a more violent shake. I have never experienced this but seems like something that would freak me out.
  
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SCOTT_T
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Re: Death Wobble
Reply #18 - 06/21/14 at 1:09am
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nope........It can happen on flat wore out country roads.
  
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Enoch
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Re: Death Wobble
Reply #19 - 06/21/14 at 1:10am
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I've had mine get this bad while holding the bars...

I amazed this guy can trust his ride this much


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« Last Edit: 06/21/14 at 1:20am by Enoch »  
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Do what you like. Stop hating people for their riding habits and get back to hating them for their skin color, religion, politics, and sexual orientation.
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