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#11
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700/23 vs 700/25 tires ?
On Thu, 29 Jan 2009 08:21:29 -0800 (PST), landotter
wrote: I can't understand why anyone heavier would want to ride a 23 except for two reasons: they came with the bike, or perhaps caught a great sale on some Vredesteins and couldn't pass em up. ;-) This guy weighs over 180s and is using 23s in the picture. He wants to go fast and they work well for that in races. http://www.cyclingnews.com/photos.ph...06/andyshen226 |
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#12
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700/23 vs 700/25 tires ?
On Jan 29, 10:47*am, John Forrest Tomlinson
wrote: On Thu, 29 Jan 2009 08:21:29 -0800 (PST), landotter wrote: I can't understand why anyone heavier would want to ride a 23 except for two reasons: they came with the bike, or perhaps caught a great sale on some Vredesteins and couldn't pass em up. ;-) This guy weighs over 180s and is using 23s in the picture. *He wants to go fast and they work well for that in races. * http://www.cyclingnews.com/photos.ph...un06/harlem06/.... Where's the evidence that he couldn't roll faster on 25s? It probably wouldn't make a difference, ultimately. For folks that aren't racing, you get a little more durability and comfort at the expense of nothing. 90% of folks flatted out on the local greenway are riding 23s. There's zero glass there, so I guess it's just fashionable to pinch flat! |
#13
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700/23 vs 700/25 tires ?
On Jan 29, 11:13*am, landotter wrote:
On Jan 29, 10:47*am, John Forrest Tomlinson wrote: On Thu, 29 Jan 2009 08:21:29 -0800 (PST), landotter wrote: I can't understand why anyone heavier would want to ride a 23 except for two reasons: they came with the bike, or perhaps caught a great sale on some Vredesteins and couldn't pass em up. ;-) This guy weighs over 180s and is using 23s in the picture. *He wants to go fast and they work well for that in races. * http://www.cyclingnews.com/photos.ph...un06/harlem06/.... Where's the evidence that he couldn't roll faster on 25s? It probably wouldn't make a difference, ultimately. For folks that aren't racing, you get a little more durability and comfort at the expense of nothing. 90% of folks flatted out on the local greenway are riding 23s. There's zero glass there, so I guess it's just fashionable to pinch flat! I use a 23 on the front, 25 on the back of my trek 2300 |
#14
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700/23 vs 700/25 tires ?
On Jan 29, 10:31*am, "Clive George" wrote:
wrote in message ... I used to use 23 mm tires exclusively. *Fashion I suppose. *I now use mostly 25mm tires. *I can't tell any difference in speed, comfort, traction, flat rate, or anything else. Didn't tyre sizes become more realistic recently? So yesterday's 23 is today's 25, or something like that? I think just opposite. Labeled 25 but really only 23 wide. And labeled 23 but just 21 wide. My Vittoria Open Pro Evo CX something or other tires are available in 23 and 25 labeled widths from the manufacturer. I'm using the 25 labeled model. How wide they really are, don't know. They do look wider than a 23 labeled model I have on another bike in front. Different brand tire though. Some day I might try a 28 labeled tire. I think they will fit on some of my road bikes. But I have lots of 25 labeled tires to wear out first before wasting money on more bike tires. |
#15
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700/23 vs 700/25 tires ?
On Thu, 29 Jan 2009 09:13:00 -0800 (PST), landotter
wrote: On Jan 29, 10:47*am, John Forrest Tomlinson wrote: On Thu, 29 Jan 2009 08:21:29 -0800 (PST), landotter wrote: I can't understand why anyone heavier would want to ride a 23 except for two reasons: they came with the bike, or perhaps caught a great sale on some Vredesteins and couldn't pass em up. ;-) This guy weighs over 180s and is using 23s in the picture. *He wants to go fast and they work well for that in races. * http://www.cyclingnews.com/photos.ph...un06/harlem06/... Where's the evidence that he couldn't roll faster on 25s? Your question was you cant' understand why anyone would make a choice other than your, not for evidence. That said, I have seen evidence, which I'll be too lazy to find now, that tires the same width as the have less wind resistance than tires that are wider. Do you accept that? If not, I'll try to find more info. It probably wouldn't make a difference, ultimately For folks that aren't racing, you get a little more durability and comfort at the expense of nothing. Ohhhh, so when you said you don't understand why anyone heavier would want to ride a 23 you meant you don't understand why anyone heavier doing the sort of riding *you* do would want to ride a 23. Is that it? |
#16
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700/23 vs 700/25 tires ?
On Thu, 29 Jan 2009 09:13:00 -0800 (PST), landotter
wrote: 90% of folks flatted out on the local greenway are riding 23s. There's zero glass there, so I guess it's just fashionable to pinch flat! So let me get this straight, if I weigh 155 pounds and ride 28s I can mock you for your tire choice and say how you seem to love risking pinch flats, since I'm on fatter tires? And if someone the same weight was on 35s and saw me, he could mock me? Is that the way it works? Rather than just saying there are tradeoffs, we can also say the person riding tires smaller than us is making a mistake and as long as we're on larger tires than they are, we've made the smarter choice? OK I understand now. |
#17
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700/23 vs 700/25 tires ?
John Forrest Tomlinson wrote:
John Forrest Tomlinson wrote: Chalo wrote: Instrumented tests have shown that for tires of equal construction, wider tires have slightly less rolling resistance at the same pressure. *Narrower tires have slightly less aerodynamic drag. *While these factors mostly offset each other, all other benefits (rim protection, ride quality, wear life, pinch flat resistance, traction)give the advantage to the wider tire. This depends on how much one weighs and what sort of roads the person is riding on. In my observation, the road surface has a much bigger role in dictating the appropriate minimum tire size. It is true that fatter tires usually have a higher weight rating, and when the rider's weight goes high enough, this becomes a consideration. And also the speeds at which the person is riding. The faster you ride, the more you need in terms of rim protection, shock absorption, wear resistance, pinch flat resistance, and traction. So the faster you go, the more you can benefit from a wider tire. Chalo |
#18
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700/23 vs 700/25 tires ?
On Thu, 29 Jan 2009 10:12:44 -0800 (PST), Chalo
wrote: The faster you ride, the more you need in terms of rim protection, shock absorption, wear resistance, pinch flat resistance, and traction. So the faster you go, the more you can benefit from a wider tire. I can see that for traction, though very few people go near the limits of traction on moderatley narrow tires. But why dod you need more for rim protection when going fast? Or shock absorbtion? Or wear resistance? And more to the point, do people trying to go fast care about a little extra shock absorbtion? When I'm going fast there's more weight on my legs and less on my hands and butt, so I notice shocks less than when just rolling along slowly. And Chalo - I have a couple friends who weigh 100-105 lbs. In your scheme of things, are they allowed to ride 23s or woudl you tell them they'd be better off riding 25s or larger? Not knowing them or their riding goals. Well? |
#19
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700/23 vs 700/25 tires ?
Chalo wrote:
John Forrest Tomlinson wrote: John Forrest Tomlinson wrote: Chalo wrote: Instrumented tests have shown that for tires of equal construction, wider tires have slightly less rolling resistance at the same pressure. Narrower tires have slightly less aerodynamic drag. While these factors mostly offset each other, all other benefits (rim protection, ride quality, wear life, pinch flat resistance, traction)give the advantage to the wider tire. This depends on how much one weighs and what sort of roads the person is riding on. In my observation, the road surface has a much bigger role in dictating the appropriate minimum tire size. It is true that fatter tires usually have a higher weight rating, and when the rider's weight goes high enough, this becomes a consideration. Yes, we know that you have special considerations where weight is a concern. But in that regard, you are an outlier. We all have personal agendas though. I, for one, tend to think generally from sporting angles rather than utilitarian, though I do love the utilitarian aspect of my bikes. And also the speeds at which the person is riding. The faster you ride, the more you need in terms of rim protection, shock absorption, wear resistance, pinch flat resistance, and traction. So the faster you go, the more you can benefit from a wider tire. Chalo |
#20
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700/23 vs 700/25 tires ?
"Chalo" wrote in message
... The faster you ride, the more you need in terms of rim protection, shock absorption, wear resistance, pinch flat resistance, and traction. So the faster you go, the more you can benefit from a wider tire. Chalo I am not convinced from my experience. Those who are going faster are lighter, when you look at broad rider weight categories. I think that's quite obvious, but maybe you disagree. Shock absorption matters little in racing. Crossing a pothole faster means less drop, so less likelihood of pinch flats, not to mention that higher pressure likely allows greater resistance to the deformations leading to them. (I can't recall a single incident of flatting while crossing low traffic circles, and fast riders don't ride into curbs regularly.) Wear resistance is not really a big consideration _in racing_ so budget accordingly. And when you accumulate all the small weight savings on a bike weighing 10 kg against one weighing 8 kg, it makes for a competitive difference. If by "fast" you were aiming at 14 mph rather than 11 mph, then I am not sure my observations apply. -- Bonne route ! Sandy Verneuil-sur-Seine FR |
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