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Airless Tires? And How Heavy Is "Heavy"?
Hi, All:
Thanks for turning me onto this latest must-have item! =) So that Schwalbe Marathon Plus sounds like the thing to get to avoid punctures...but how heavy is "heavy," really? And what about airless tires? What are they, how do they work? TIA!! |
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#2
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Airless Tires? And How Heavy Is "Heavy"?
On 3 Feb 2006 12:22:41 -0800, "NYC XYZ"
wrote: And what about airless tires? What are they, how do they work? They are semi-solid constructs, sometimes using a conventional tube with a foam doughnut in place of the tube, and sometimes made as a unit with the foam center molded in place within the tire shell. While they are often regarded as a good thing on wheelchairs and other low-speed devoces which require a minimal-maintenance service situation, they have far higher rolling resistance than most conventional tires (even the puncture-resistant ones fare better from what I've heard) and they ride very rough; like running a conventional tire severely over rated pressure. Some recreational and commuter cyclists like them. No competitive and few enthusiast cyclists feel that the penalties justify the expense, inefficiency, and difficulty of installation. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#3
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Airless Tires? And How Heavy Is "Heavy"?
In the past 4 years, I have ridden on average, 2,000 miles per year. I
have had one puncture flat in that time. What do I ride? Tubulars (aka sew-ups). Half were standard butyl tubed, the others TUFO vulcanized tublesss tubulars. "Impossible!" is what I hear all the time. But if you know how to use tubulars, they are far better in this respect. Clinchers are prone to flatting. The stiffness of the construction encourages puncture rather than deformation. The tube is prone to pinch flats. And no, this is not because of "faulty installation." It is the "snakebite" phenomenon--which happens to mountainbikers even more frequently. At some point, you will bottom out to the rim flange, and when you do, it is snakebite time. Tubulars don't have that sharp flange, and so bottoming out never damages anything. Go ahead and ride your airless bricks. See if you have fun. The great thing about tubulars is that they are less flat-prone and at the same time the most fun to ride! (Nothing accelerates, corners or feels like a good tubular). And you don't have to deal with trying to get that kevar bead over the flange in the winter, as you do with clinchers. Tubul;ars are easy to change--just strip one off and pull the new one on. Mileage: rear tires, I get 1,000 miles on a lightweight trainer (Conti Giro) or TUFO performance type. I gert 2,000 rear wheel miles on the heavier TUFOS. front tires, I get over 4,000 miles and have to change them due to drying out, rather than treadwear. |
#4
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Airless Tires? And How Heavy Is "Heavy"?
Maybe if you have constant flats; I tried some back in the 70s and
(a) they're real bait for screwdriver skin punctures trying to get them on and off (b) they don't solve the changing tire problem! The tube wears through in a little longer than it takes normally (because you don't care about actually wearing through as much) so you still have to change the sucker, and that's _hard_, going off and going on. (c) the increased vibration breaks apart the hub flange at the spoke holes. Cheng Shin tires last forever, if you want an alternative, though they have by far the greatest rolling resistance I've ever run into. -- Ron Hardin On the internet, nobody knows you're a jerk. |
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Airless Tires? And How Heavy Is "Heavy"?
"NYC XYZ" writes:
Hi, All: Thanks for turning me onto this latest must-have item! =) So that Schwalbe Marathon Plus sounds like the thing to get to avoid punctures...but how heavy is "heavy," really? And what about airless tires? What are they, how do they work? They ride like they have 200 psi in them, and they roll like they have 40 psi in them. In other words, the worst of both worlds. They won't go flat but you'll also not enjoy riding your bike... |
#6
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Airless Tires? And How Heavy Is "Heavy"?
"bill" writes:
In the past 4 years, I have ridden on average, 2,000 miles per year. I have had one puncture flat in that time. 8,000 miles and "one puncture flat." Have you had other types of flats? What do I ride? Tubulars (aka sew-ups). Half were standard butyl tubed, the others TUFO vulcanized tublesss tubulars. "Impossible!" is what I hear all the time. But if you know how to use tubulars, they are far better in this respect. Clinchers are prone to flatting. The stiffness of the construction encourages puncture rather than deformation. Malarkey. Pure and simple. Those who have ridden both know that you are either making this up or thoroughly confused. There are lots of clinchers available with casings every bit as supple as tubulars. Hell, most tubulars are nowhere near as supple as the old Setas but people talk about them like all tubulars are like those old silks. The tube is prone to pinch flats. And no, this is not because of "faulty installation." It is the "snakebite" phenomenon--which happens to mountainbikers even more frequently. At some point, you will bottom out to the rim flange, and when you do, it is snakebite time. Fairly true. Although I can't recall a pinch flat on my clinchers in quite a while, a couple of years maybe. Tubulars don't have that sharp flange, and so bottoming out never damages anything. Malarkey again. Go ahead and ride your airless bricks. See if you have fun. The great thing about tubulars is that they are less flat-prone and at the same time the most fun to ride! (Nothing accelerates, corners or feels like a good tubular). A double dose of you-know-what here. And you don't have to deal with trying to get that kevar bead over the flange in the winter, as you do with clinchers. Tubul;ars are easy to change--just strip one off and pull the new one on. I can change the tube out of a clincher faster than I can replace a tubular. Mileage: rear tires, I get 1,000 miles on a lightweight trainer (Conti Giro) or TUFO performance type. I gert 2,000 rear wheel miles on the heavier TUFOS. Wow. I'd be really ****ed off if I only got 1000 miles on a rear tire before it wore out. front tires, I get over 4,000 miles and have to change them due to drying out, rather than treadwear. Rotating your tires correctly prevents this problem. Take the worn out rear tire off, swap the front tire onto the rear wheel and put the new tire on the front. |
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Airless Tires? And How Heavy Is "Heavy"?
Tim McNamara wrote:
Rotating your tires correctly prevents this problem. Take the worn out rear tire off, swap the front tire onto the rear wheel and put the new tire on the front. Tim, I don't understand the logic of this. If you are wearing out your rear tire twice as fast, why put a half used tire on the rear? Would you not have to replace it twice as quickly as if you put the new tire on the rear? Not trying to be a wise guy, just trying to understand what you are saying. ... Although I can't recall a pinch flat on my clinchers in quite a while, a couple of years maybe. Agree with you completely. I can't imagine ever having a pinch flat on a properly inflated road tire unless I somehow manage to hit a pot hole or am unable to avoid running over a foreign object. |
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Airless Tires? And How Heavy Is "Heavy"?
catzz66 writes:
Tim McNamara wrote: Rotating your tires correctly prevents this problem. Take the worn out rear tire off, swap the front tire onto the rear wheel and put the new tire on the front. Tim, I don't understand the logic of this. If you are wearing out your rear tire twice as fast, why put a half used tire on the rear? Would you not have to replace it twice as quickly as if you put the new tire on the rear? Not trying to be a wise guy, just trying to understand what you are saying. Ah, that's pretty simple. As was pointed out in the post to whch I was responding, the front tire basically never wears out but eventually fails from aging- spossibly with a sidewall blowout or something else catstrophic. By swapping the front tire onto the back and putting the new rubber up front, you eliminate this problem. |
#9
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Airless Tires? And How Heavy Is "Heavy"?
catzz66 wrote:
Tim McNamara wrote: Rotating your tires correctly prevents this problem. Take the worn out rear tire off, swap the front tire onto the rear wheel and put the new tire on the front. Tim, I don't understand the logic of this. If you are wearing out your rear tire twice as fast, why put a half used tire on the rear? Would you not have to replace it twice as quickly as if you put the new tire on the rear? Not trying to be a wise guy, just trying to understand what you are saying. Big reason, if your rear tire blows out, your back wheel will stop, and your bike will drag it's butt, until you stop. If your front tire blows out, you front wheel will stop, and you do a OTB face plant. I don't know given that option, I would rather have the rear one go.... W |
#10
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Airless Tires? And How Heavy Is "Heavy"?
"The Wogster" wrote in message . .. catzz66 wrote: Tim McNamara wrote: Rotating your tires correctly prevents this problem. Take the worn out rear tire off, swap the front tire onto the rear wheel and put the new tire on the front. Tim, I don't understand the logic of this. If you are wearing out your rear tire twice as fast, why put a half used tire on the rear? Would you not have to replace it twice as quickly as if you put the new tire on the rear? Not trying to be a wise guy, just trying to understand what you are saying. Big reason, if your rear tire blows out, your back wheel will stop, and your bike will drag it's butt, until you stop. If your front tire blows out, you front wheel will stop, and you do a OTB face plant. I don't know given that option, I would rather have the rear one go.... I don't know about the road but on mtn bikes front tire traction is much more important than rear tire traction. If I'm running the same tires front and rear I always rotate front to rear. Nice new edges on the front knobs and an almost new tire on the rear. The ratio of rear wear to front wear is probably a lot higher off-road. Greg |
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