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Can Disk Brakes flip you over the handle bars?
Obviously I would assume they could if you clamp down fast enough. I ask because I bruised some rib bones this week when I stomped the front brake and *surprise* I found out later my front rim has a bubble bend in it from (I guess) a pot hole at some recent time. Made for a portion of the rim that just wasn't going to get past the brake pads, not while I was trying to actually use said brakes. It would seem a better setup would be one unaffected by a slightly bent rim, or so I wonder. TBerk it would have been funny if it hadn't hurt so much at the time |
#2
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Can Disk Brakes flip you over the handle bars?
The Berk wrote:
Obviously I would assume they could if you clamp down fast enough. I ask because I bruised some rib bones this week when I stomped the front brake and *surprise* I found out later my front rim has a bubble bend in it from (I guess) a pot hole at some recent time. Made for a portion of the rim that just wasn't going to get past the brake pads, not while I was trying to actually use said brakes. It would seem a better setup would be one unaffected by a slightly bent rim, or so I wonder. http://www.sheldonbrown.com/brandt/over-the-bars.html it would have been funny if it hadn't hurt so much at the time Don't laugh. I wouldn't be so ready to tell all that I used bicycle brakes in such a clumsy manner. Skilled motorcyclists do nose-down wheelies at high speed, often crossing the finish line on only the front wheel. That takes a bit of extra skill. A motorcyclist crashed fatally yesterday in East Palo Alto doing that. Jobst Brandt |
#4
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Can Disk Brakes flip you over the handle bars?
"DougC" wrote in message
... The reason I say "hydraulic brakes" is that the power of cable-operated disks varies with the cable lengths. The braking power front-to-rear on an upright bike is a bit disappointing, but the difference on a longer recumbent can be huge (does anyplace make thicker brake cable & jacket, that will work with normal brakes? I'd try it...). It's why our tandems all have hydraulic brakes. 2 with magura rims, one with discs. And tandems also have the "brake as hard as you like, you're not going over the top" thing :-) cheers, clive |
#5
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Can Disk Brakes flip you over the handle bars?
Doug Cimper wrote:
Obviously I would assume they could if you clamp down fast enough. I ask because I bruised some rib bones this week when I stomped the front brake and *surprise* I found out later my front rim has a bubble bend in it from (I guess) a pot hole at some recent time. .... http://www.sheldonbrown.com/brandt/over-the-bars.html it would have been funny if it hadn't hurt so much at the time Don't laugh. I wouldn't be so ready to tell all that I used bicycle brakes in such a clumsy manner. Skilled motorcyclists do nose-down wheelies at high speed, often crossing the finish line on only the front wheel. That takes a bit of extra skill. A motorcyclist crashed fatally yesterday in East Palo Alto doing that. As someone else noted, most recumbents are immune to this flipping-over-forward problem under hard braking. In my opinion this is another reason that recumbents may be safer for general use--in that during a panic stop, the brakes can be applied with wild abandon and while the bike may slide out and drop the rider sideways, at least it's not going to flip them over onto their head... I think you should read the FAQ item first at: http://www.sheldonbrown.com/brandt/over-the-bars.html before giving the usual endless pitch about the superiority of recumbents. Going over the bars, especially with disk brakes, is highly unlikely to be caused by locking the front wheel, but rather follows the scenario described in the FAQ. Jobst Brandt |
#6
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Can Disk Brakes flip you over the handle bars?
wrote:
I think you should read the FAQ item first at: http://www.sheldonbrown.com/brandt/over-the-bars.html before giving the usual endless pitch about the superiority of recumbents. Going over the bars, especially with disk brakes, is highly unlikely to be caused by locking the front wheel, but rather follows the scenario described in the FAQ. The problem with the concept of "bracing with the arms" to use the front brake of an upright bicycle is that--by nature--most crashes are basically unanticipated. That's why there's crashes. And as I noted--a bicycle doesn't need to tip completely over forward to be unsafe during a panic stop. Merely un-weighting the rear tire enough for the rear end to swing out left or right can result in a crash. This is easy to demonstrate on pretty much any upright bicycle with decent front brakes, and just about impossible to do on any long-wheelbase recumbent. If one is worried about "going over the bars" during a panic stop, it *IS* possible to pick a bicycle that basically won't ever do it. ~ |
#7
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Can Disk Brakes flip you over the handle bars?
On Thu, 01 May 2008 12:02:27 -0500, DougC wrote:
wrote: I think you should read the FAQ item first at: http://www.sheldonbrown.com/brandt/over-the-bars.html before giving the usual endless pitch about the superiority of recumbents. Going over the bars, especially with disk brakes, is highly unlikely to be caused by locking the front wheel, but rather follows the scenario described in the FAQ. The problem with the concept of "bracing with the arms" to use the front brake of an upright bicycle is that--by nature--most crashes are basically unanticipated. That's why there's crashes. And as I noted--a bicycle doesn't need to tip completely over forward to be unsafe during a panic stop. Merely un-weighting the rear tire enough for the rear end to swing out left or right can result in a crash. Or, like the Raptor trike, be badly designed - that one had a very small bolt loaded in shear about 1" from the front wheel axle as a means of controlling brake torque. It broke when the ten-year old was riding it; the steering arm went forward pulling him over the front wheels and out of the trike; fortunately he was on the pavement at the time. It's been fixed now; the brake torque is now taken by a triangluted arrangement that is much larger and much stronger, with only a few ounces additional weight. |
#8
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Can Disk Brakes flip you over the handle bars?
Doug Cimper wrote:
wrote: I think you should read the FAQ item first at: http://www.sheldonbrown.com/brandt/over-the-bars.html before giving the usual endless pitch about the superiority of recumbents. Going over the bars, especially with disk brakes, is highly unlikely to be caused by locking the front wheel, but rather follows the scenario described in the FAQ. The problem with the concept of "bracing with the arms" to use the front brake of an upright bicycle is that--by nature--most crashes are basically unanticipated. That's why there's crashes. [...] On a recumbent bicycle, the rider does not need to brace with his/her arms to keep from going over the bars, as his/her legs are naturally in a position to provide the required bracing. The above would be obvious to someone who has actually ridden a properly designed recumbent in real world settings. -- Tom Sherman - Holstein-Friesland Bovinia The weather is here, wish you were beautiful |
#9
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Can Disk Brakes flip you over the handle bars?
On Apr 30, 9:48 pm, wrote:
The Berk wrote: Obviously I would assume they could if you clamp down fast enough. I ask because I bruised some rib bones this week when I stomped the front brake and *surprise* I found out later my front rim has a bubble bend in it from (I guess) a pot hole at some recent time. Made for a portion of the rim that just wasn't going to get past the brake pads, not while I was trying to actually use said brakes. It would seem a better setup would be one unaffected by a slightly bent rim, or so I wonder. http://www.sheldonbrown.com/brandt/over-the-bars.html it would have been funny if it hadn't hurt so much at the time Don't laugh. I wouldn't be so ready to tell all that I used bicycle brakes in such a clumsy manner. Skilled motorcyclists do nose-down wheelies at high speed, often crossing the finish line on only the front wheel. That takes a bit of extra skill. A motorcyclist crashed fatally yesterday in East Palo Alto doing that. Jobst Brandt Bite me Jobst. TBerk |
#10
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Can Disk Brakes flip you over the handle bars?
In article
, TBerk wrote: On Apr 30, 9:48 pm, wrote: The Berk wrote: Obviously I would assume they could if you clamp down fast enough. I ask because I bruised some rib bones this week when I stomped the front brake and *surprise* I found out later my front rim has a bubble bend in it from (I guess) a pot hole at some recent time. Made for a portion of the rim that just wasn't going to get past the brake pads, not while I was trying to actually use said brakes. It would seem a better setup would be one unaffected by a slightly bent rim, or so I wonder. http://www.sheldonbrown.com/brandt/over-the-bars.html it would have been funny if it hadn't hurt so much at the time Don't laugh. I wouldn't be so ready to tell all that I used bicycle brakes in such a clumsy manner. Skilled motorcyclists do nose-down wheelies at high speed, often crossing the finish line on only the front wheel. That takes a bit of extra skill. A motorcyclist crashed fatally yesterday in East Palo Alto doing that. Jobst Brandt Bite me Jobst. TBerk, have you ever gone over your bars while braking? -- Michael Press |
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