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Two unusual vintage bicycle tires - does anybody remember these?
In my various discussions of bicycle tire manufacturing trivia, there's
two examples that other people have mentioned but could not remember all the details of: 1. the first example was a folding tire, produced long before Kevlar beads became common. This tire had short (~1") segments of wire or some other hard material in the beads, instead of a solid hoop of continuous wire or cable. 2. Another was a tire that had tread on both the inside and the outside. Once the /first/ side was worn down, you could flip the tire inside-out and use the other side until that was worn too. It's not a critical matter, but a few times I've tried searching with Google and not ever managed to find any info about either tire. |
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#2
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Two unusual vintage bicycle tires - does anybody remember these?
Try
https://www.google.com/search?q=two+...obile&ie=UTF-8 English language search plus 'patent' Or use Google Patent, a separate search area page |
#3
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Two unusual vintage bicycle tires - does anybody remember these?
On 12/3/2016 9:10 PM, DougC wrote:
In my various discussions of bicycle tire manufacturing trivia, there's two examples that other people have mentioned but could not remember all the details of: 1. the first example was a folding tire, produced long before Kevlar beads became common. This tire had short (~1") segments of wire or some other hard material in the beads, instead of a solid hoop of continuous wire or cable. 2. Another was a tire that had tread on both the inside and the outside. Once the /first/ side was worn down, you could flip the tire inside-out and use the other side until that was worn too. It's not a critical matter, but a few times I've tried searching with Google and not ever managed to find any info about either tire. I don't know either. That said you may be thinking of Jobst Brandt's experiment with a snipped bead to show that the mechanical lip of a modern rim is sufficient, obviating the Michelin principle. To the 2d item, my intuition is that the fabric and tread on most products would not allow flipping a tire inside out without delamination. I could be wrong and there may be some technique to get around that issue but most tires wouldn't be able to do that. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#4
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Two unusual vintage bicycle tires - does anybody remember these?
since 1 April, 1971
WE'RE WAITING ON THE PATENT SEE HOW |
#5
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Two unusual vintage bicycle tires - does anybody remember these?
1 April, 1971
WAITING ON THE PATENT SEE HOW THE TUBE GOES IN ..... |
#6
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Two unusual vintage bicycle tires - does anybody remember these?
On Sun, 04 Dec 2016 09:43:54 -0600, AMuzi wrote:
On 12/3/2016 9:10 PM, DougC wrote: In my various discussions of bicycle tire manufacturing trivia, there's two examples that other people have mentioned but could not remember all the details of: 1. the first example was a folding tire, produced long before Kevlar beads became common. This tire had short (~1") segments of wire or some other hard material in the beads, instead of a solid hoop of continuous wire or cable. 2. Another was a tire that had tread on both the inside and the outside. Once the /first/ side was worn down, you could flip the tire inside-out and use the other side until that was worn too. It's not a critical matter, but a few times I've tried searching with Google and not ever managed to find any info about either tire. I don't know either. That said you may be thinking of Jobst Brandt's experiment with a snipped bead to show that the mechanical lip of a modern rim is sufficient, obviating the Michelin principle. To the 2d item, my intuition is that the fabric and tread on most products would not allow flipping a tire inside out without delamination. I could be wrong and there may be some technique to get around that issue but most tires wouldn't be able to do that. I'm wondering about the shape of the bead on a reversible tire. I also can't see an advantage to a reversible tire. If "X" amount of rubber is layered on both sides of a tire carcass it seems as though the tire would be little different in weight or service life than a tire with 2 times "X" rubber layered on one side of the carcass. Perhaps that is why they don't seem to be available these days :-) -- cheers, John B. |
#7
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Two unusual vintage bicycle tires - does anybody remember these?
The sidewall wears, the worn tread will not support a tube
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#8
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Two unusual vintage bicycle tires - does anybody remember these?
On Sunday, December 4, 2016 at 4:23:49 PM UTC-8, John B. wrote:
On Sun, 04 Dec 2016 09:43:54 -0600, AMuzi wrote: On 12/3/2016 9:10 PM, DougC wrote: In my various discussions of bicycle tire manufacturing trivia, there's two examples that other people have mentioned but could not remember all the details of: 1. the first example was a folding tire, produced long before Kevlar beads became common. This tire had short (~1") segments of wire or some other hard material in the beads, instead of a solid hoop of continuous wire or cable. 2. Another was a tire that had tread on both the inside and the outside. Once the /first/ side was worn down, you could flip the tire inside-out and use the other side until that was worn too. It's not a critical matter, but a few times I've tried searching with Google and not ever managed to find any info about either tire. I don't know either. That said you may be thinking of Jobst Brandt's experiment with a snipped bead to show that the mechanical lip of a modern rim is sufficient, obviating the Michelin principle. To the 2d item, my intuition is that the fabric and tread on most products would not allow flipping a tire inside out without delamination. I could be wrong and there may be some technique to get around that issue but most tires wouldn't be able to do that. I'm wondering about the shape of the bead on a reversible tire. I also can't see an advantage to a reversible tire. If "X" amount of rubber is layered on both sides of a tire carcass it seems as though the tire would be little different in weight or service life than a tire with 2 times "X" rubber layered on one side of the carcass. Perhaps that is why they don't seem to be available these days :-) -- cheers, John B. I'm waiting for a reversible glue-on. |
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