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Can Disk Brakes flip you over the handle bars?
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Can Disk Brakes flip you over the handle bars?
Tom Sherman 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. it would have been funny if it hadn't hurt so much at the time Disk brakes have more stopping power and any such 'stomp' can result in a flip, not requiring any irregularities. Due to their design, recumbents are immune from such a flip. Recumbents with PROPER weight distribution will skid the front wheel instead of sending the rider over the bars. Some early bad designs, such as the Hypercycle, would send the rider off the front under heavy braking, and had too little weight on the rear wheel for it to provide much braking. I've seen nay recumbents with a small front wheel and cranks and pedals forward of that wheel. These units will endo easily while the rider remains firmly in the seat. The advantage is that the rider, if a bit agile, will land on his feet running. The bike does not fare as well as it overturns and scraped the road. I often wonder if the Hypercycle and its ilk are responsible for much of the negative attitudes toward recumbents by certain riders. Certainly, if a rider's only experience was the ill handling, poor climbing and poor braking Hypercycle, they would not look kindly on recumbents as a whole. Long wheelbase recumbents have a slew of other problems in maneuverability and climbing rough stuff. Disk brakes are not one of their problems. Jobst Brandt |
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Can Disk Brakes flip you over the handle bars?
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Can Disk Brakes flip you over the handle bars?
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Can Disk Brakes flip you over the handle bars?
Zebee Johnstone wrote:
In alt.rec.bicycles.recumbent on 02 May 2008 01:44:09 GMT wrote: I've seen nay recumbents with a small front wheel and cranks and pedals forward of that wheel. These units will endo easily while the rider remains firmly in the seat. The advantage is that the rider, if a bit agile, will land on his feet running. The bike does not fare as well as it overturns and scraped the road. Will they? I've been hard on the picks (front disk even!) on my Giro 20 going downhill. The back (v-brake) skidded, so I let up, I did my damndest not to lock the front, and didn't (riding a motorcycle has some advantages) but the thing showed no sign of an endo I could feel. Since this is a Giro 20, it should be noted that the front wheel size is ISO 406-mm, which is relevant, since the effectiveness of a disc (or drum) brake increases with decreasing wheel diameter. Indeed, trying same when I first got the disks didn't get me anywhere. Locking the front is hard to do when you have trained for years not to, so maybe I wasn't trying hard enough. Never felt a massive weight transfer forward, nothing like pulling a stoppie on a motorcycle (which I have done more than once). See other posts about the rider's legs providing bracing against the rider moving forward. If they will "endo easily" then I must be dreaming... So I have to ask... have you ridden one? Have you managed to endo it? The anti-recumbent "experts" don't need no steenkin' test rides! If so, how? What did it feel like, when did the weight transfer get so over rather than forward (hard transfer on a bent feels qualitatively different to hard transfer on an upright to me), and how fast did you have to go, and how fast were you going when you managed to get it to go over? Back in the early days of the 20th Century recumbent revival (e.g. Hypercycle, the never produced Avatar 1000,) the designers mistakenly thought that some heel/wheel overlap needed to be avoided. Therefore, the boom was made very long and the rider was seated almost over the front wheel. This led to too flexible booms which made climbing and acceleration poor, poor handling - especially when hitting bumps at speed , and the bike rotating forward about the front wheel contact patch under hard braking. Modern short=wheelbase recumbent sensibly trade off some heel overlap for proper weight distribution and have none of the above flaws. However, some of the "experts" tried the earlier designs 25 or 30 years ago and have closed their minds to later improvements. -- Tom Sherman - Holstein-Friesland Bovinia The weather is here, wish you were beautiful |
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Can Disk Brakes flip you over the handle bars?
"Tom Sherman" wrote in message ... [...] Back in the early days of the 20th Century recumbent revival (e.g. Hypercycle, the never produced Avatar 1000,) the designers mistakenly thought that some heel/wheel overlap needed to be avoided. Therefore, the boom was made very long and the rider was seated almost over the front wheel. This led to too flexible booms which made climbing and acceleration poor, poor handling - especially when hitting bumps at speed , and the bike rotating forward about the front wheel contact patch under hard braking. Modern short=wheelbase recumbent sensibly trade off some heel overlap for proper weight distribution and have none of the above flaws. However, some of the "experts" tried the earlier designs 25 or 30 years ago and have closed their minds to later improvements. Even so, SWB recumbents do not handle well and tend to be squirrely. They are fine for around town for a few hours, but they are the pits on day long rides. Also, heel overlap is not a good idea. Sooner or later it will trip you up. Regards, Ed Dolan the Great - Minnesota aka Saint Edward the Great - Order of the Perpetual Sorrows - Minnesota |
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Can Disk Brakes flip you over the handle bars?
Edward Dolan wrote:
"Tom Sherman" wrote in message ... [...] Back in the early days of the 20th Century recumbent revival (e.g. Hypercycle, the never produced Avatar 1000,) the designers mistakenly thought that some heel/wheel overlap needed to be avoided. Therefore, the boom was made very long and the rider was seated almost over the front wheel. This led to too flexible booms which made climbing and acceleration poor, poor handling - especially when hitting bumps at speed , and the bike rotating forward about the front wheel contact patch under hard braking. Modern short=wheelbase recumbent sensibly trade off some heel overlap for proper weight distribution and have none of the above flaws. However, some of the "experts" tried the earlier designs 25 or 30 years ago and have closed their minds to later improvements. Even so, SWB recumbents do not handle well and tend to be squirrely. They are fine for around town for a few hours, but they are the pits on day long rides. My short-wheelbase recumbents (RANS Rocket, Earth Cycles Sunset Lowracer) are easy to ride, even after I have hammered to the point of exhaustion on a double metric century. Also, heel overlap is not a good idea. Sooner or later it will trip you up. Not a big deal as long as there is nothing for the crank to hit. Crank to wheel overlap can dump you in a hurry. Of course, that can only happen at low speed, and a low speed fall on a recumbent is trivial compared to doing the same on an upright. -- Tom Sherman - Holstein-Friesland Bovinia The weather is here, wish you were beautiful |
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