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.

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

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

since 1 April, 1971

WE'RE WAITING ON THE PATENT SEE HOW

1 April, 1971

WAITING ON THE PATENT SEE HOW THE TUBE GOES IN .....

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.

The sidewall wears, the worn tread will not support a tube

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.