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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
I have noticed that in recent year more riders are using the solid
carbon fiber disc wheels as opposed the Campagnolo Ghibli. Does anyone know the advantages and disadvantages other than the sinusoidal benefits that the Ghibli disc's have. My guess is that since the Ghibli is made of kevlar there is some loss of energy since they flex more. |
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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
I don't think cost is a issue. Sponorship plays a factor, but I have
noticed that in many cases a rider will use a different brand than what the team normally uses. The big difference I have noticed is that more riders are using disks that have a flat rather than a convex surface. In the end I think it boils down to technical advantage. I have not compared the weights recently, but I am sure that is a major consideration. |
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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
psycholist wrote:
"Carl Sundquist" wrote in message oups.com... wrote: I don't think cost is a issue. Sponorship plays a factor, but I have noticed that in many cases a rider will use a different brand than what the team normally uses. The big difference I have noticed is that more riders are using disks that have a flat rather than a convex surface. In the end I think it boils down to technical advantage. I have not compared the weights recently, but I am sure that is a major consideration. Based on more than decade old information, I was under the impression that a lenticular shape performed slightly better than flat. From what I gleaned on a quick google search is that the difference in drag between flat and lens is less than the margin of error, but a lens shape may provide slightly better handling characteristics in side winds. Yes, but then compare weights of, say, a HED lenticular (or even their "superlight" version) to a Renn 575. The Renn is a good bit lighter. Wonder if that wouldn't pretty much negate what little advantage would be gained from a lenticular shape. (Don't have the weights on Zipp disk wheels handy, but when you're talking about a wheel that costs almost $1,000 more than a Renn 575 ... well, that's not in my reality.) The Renn 575 is probably lighter, but its flat carbon sides are significantly recessed from the sides of the aluminum rim, which would seem to be bad aerodynamically. I suspect this is because the honeycomb core the Renn uses is not available in the exact thickness they need, so they use the next smaller thickness. The HED has a smooth transition from the rim side to the disk. I haven't seen any tests comparing drag of these two disks. Dave Lehnen |
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Solid carbon disk wheel vs Campagnolo kevlar Ghibli disk wheels
On 12 Sep 2005 04:25:08 -0700, "Carl Sundquist"
wrote: wrote: I don't think cost is a issue. Sponorship plays a factor, but I have noticed that in many cases a rider will use a different brand than what the team normally uses. The big difference I have noticed is that more riders are using disks that have a flat rather than a convex surface. In the end I think it boils down to technical advantage. I have not compared the weights recently, but I am sure that is a major consideration. Based on more than decade old information, I was under the impression that a lenticular shape performed slightly better than flat. From what I gleaned on a quick google search is that the difference in drag between flat and lens is less than the margin of error, but a lens shape may provide slightly better handling characteristics in side winds. Interaction with the frame also enters the equation - British Cycling decided a lenticular disc worked better on their track frame, if only by a very small margin, but I expect everybody else is doing the same kind of wind tunnel work and some choose parallel sided discs. I also read recently in an interview with Steve Hed " As bike design is changing, as aero seat-stays and aero seat-tubes are changing, a disc wheel is probably not the best wheel for the future anymore. I think a tri-spoke or some version of something else... " http://www.cyclingnews.com/road/2005...es/georgia_hed Kinky Cowboy* *Batteries not included May contain traces of nuts Your milage may vary |
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