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700/23 vs 700/25 tires ?
Is there any real difference between 23mm and 25mm tires as far as
speed. Will 2mm make you that slower or faster? thanks, Jeff |
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700/23 vs 700/25 tires ?
jeffreybike wrote:
Is there any real difference between 23mm and 25mm tires as far as speed. Will 2mm make you that slower or faster? There is no significant difference in speed between those two sizes of tire. Too narrow a tire will slow you down quite a lot when you get a pinch flat and have to stop and repair it. 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. Sport road bikes generally work best with the widest tire that will fit under the brakes and between the chainstays with adequate clearance. This is often a 28mm tire. Chalo |
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700/23 vs 700/25 tires ?
On Wed, 28 Jan 2009 19:38:42 -0800 (PST), 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. |
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700/23 vs 700/25 tires ?
On Thu, 29 Jan 2009 04:03:49 GMT, John Forrest Tomlinson
wrote: On Wed, 28 Jan 2009 19:38:42 -0800 (PST), 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. And also the speeds at which the person is riding. |
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700/23 vs 700/25 tires ?
Chalo wrote:
jeffreybike wrote: Is there any real difference between 23mm and 25mm tires as far as speed. Will 2mm make you that slower or faster? There is no significant difference in speed between those two sizes of tire. Too narrow a tire will slow you down quite a lot when you get a pinch flat and have to stop and repair it. The rider will never get a pinch flat if it can be inflated highly enough to support his weight when the tyre is slammed into potholes, etc. Instrumented tests have shown that for tires of equal construction, wider tires have slightly less rolling resistance at the same pressure. But wider tyres should not be inflated so highly to provide the same suspension and traction, so then they are slower on the smoothest surfaces, though faster on bumpy surfaces. Narrower tires have slightly less aerodynamic drag. And less weight. 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. Sport road bikes generally work best with the widest tire that will fit under the brakes and between the chainstays with adequate clearance. This is often a 28mm tire. Often 25mm too, sometimes only 23mm. ~PB |
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700/23 vs 700/25 tires ?
On Jan 28, 9:27*pm, jeffreybike wrote:
Is there any real difference between 23mm and 25mm tires as far as speed. Will 2mm make you that slower or faster? thanks, Jeff 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. |
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700/23 vs 700/25 tires ?
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700/23 vs 700/25 tires ?
On Jan 28, 10:27*pm, jeffreybike wrote:
Is there any real difference between 23mm and 25mm tires as far as speed. Will 2mm make you that slower or faster? thanks, Jeff The first thing to realize is that tire sizes are nominal, not actual. For many, many years tire manufacturers have mislabeled their tires. Why? Because many cyclists think any tiny difference will make tremendous changes in their riding - especially differences in weight. So Company X makes a 23 mm tire, but labels it a 25 mm tire. And the deluded consumer looks in the catalog and says "Wow, Company X makes a 25 that's fifteen whole grams lighter than that of Company Y!" He buys it under false pretenses. One of my riding buddies has always been very evenly matched with me. In the past ten years, he's gradually gone to carbon fiber everything, and his tires are now down to 19 mm that he says he inflates to 160 psi, to avoid pinch flats. I'm still on the same touring bike, riding (actual measurement) 26 mm tires. He's still evenly matched with me. It takes a big change in weight or rolling resistance to be detectable. Keep in mind, tires not only support your weight and give traction, but they also provide suspension. Narrower tires are more like solid rubber tires. A thin coating of solid rubber would have the lowest rolling resistance on a perfectly smooth surface, but only track racing takes place on perfectly smooth surfaces. On our roads, my friends 19s are probably slower than my 26s. - Frank Krygowski |
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700/23 vs 700/25 tires ?
On Jan 29, 9:29 am, Peter Cole wrote:
wrote: On Jan 28, 9:27 pm, jeffreybike wrote: Is there any real difference between 23mm and 25mm tires as far as speed. Will 2mm make you that slower or faster? thanks, Jeff 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. I went through the same process, then went on to 28mm, 32mm, and now 35mm on one bike. Fatter tires might be slightly slower, but it's small enough to not be obvious. The difference in comfort is pretty obvious. I like 28-32s for road riding, whether I'm on my fixed gear or my racked up bike. Being able to run 80psi up front makes a whole world of comfort open up. I weigh about 170 at 6'1", another factor to consider, and 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. ;-) To be more accurate--I like tires that weigh around 350g. With Panaracers--that's nice puffy 32mm that rolls super fast due to the flexible carcass. I've ridden 35-38s that are a hundred grams more-- and I do feel a bit slower. There are also terrible skinnier tires that have a lot of rolling resistance. Worst are the "armored up" tires that feel like garden hoses and need four tire levers to install. They can be wide and fairly low pressure--yet still ride terrible. At any rate, to the OP: ride 25s for crying out loud. If you weigh more than I do and can fit 28s, go for it. If you're not racing, the durability and longevity is worth the tiny tradeoff in psychological benefit that one gets by mounting ridiculously narrow tires. ;-) |
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700/23 vs 700/25 tires ?
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? |
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