open frame with two top-tubes down the rear axle [photo]

I prefer the closed or diamond frame but for
open frames I think this is my favorite:

http://user.it.uu.se/~embe8573/bike/danish.jpg

I asked some guy about it and he said it is
a Danish design and a robust construction.
But actually I don't know.

--
underground experts united
http://user.it.uu.se/~embe8573

On 7/2/2017 6:26 PM, Emanuel Berg wrote:
I prefer the closed or diamond frame but for
open frames I think this is my favorite:

http://user.it.uu.se/~embe8573/bike/danish.jpg

I asked some guy about it and he said it is
a Danish design and a robust construction.
But actually I don't know.

That's what we call a "mixte" frame.

For many years my wife rode a Raleigh with a visually identical frame.
We passed it down to our daughter; then when my daughter got her Terry
bike, the mixte went to another member of our extended family.

Mixte frames have a reputation for being sturdier than the typical
women's frame, with a single top tube brazed into the seat tube perhaps
20 cm above the cranks. But they're not as rigid as a typical men's
frame with a nearly horizontal top tube. We learned this when we put a
rear rack and panniers on my wife's mixte.

--
- Frank Krygowski

On Sunday, July 2, 2017 at 3:26:44 PM UTC-7, Emanuel Berg wrote:
I prefer the closed or diamond frame but for
open frames I think this is my favorite:

http://user.it.uu.se/~embe8573/bike/danish.jpg

I asked some guy about it and he said it is
a Danish design and a robust construction.
But actually I don't know.

That's a Mixte frame which I believe was originally a French design. They come in two styles: With or without rear seat stays. I prefer with.

On Sunday, July 2, 2017 at 11:26:44 PM UTC+1, Emanuel Berg wrote:
I prefer the closed or diamond frame but for
open frames I think this is my favorite:

http://user.it.uu.se/~embe8573/bike/danish.jpg

I asked some guy about it and he said it is
a Danish design and a robust construction.
But actually I don't know.

--
underground experts united
http://user.it.uu.se/~embe8573

It's a very useful, stiff frame, called a mixte. Here's a version called a Unisex Crossframe Deluxe, which has been in production almost continuously since 1936. This one is my Utopia Kranich, made in this century, but the linked document shows the original bikes from which my monster was developed:
http://coolmainpress.com/BICYCLING.html
And here is a description of how all that stiffness is applied to making a superior-handling, very fast, very secure bike:
http://thorncyclesforum.co.uk/index.php?topic=3798.15

A bicycle with a frame in one dimension, in which a single tube runs straight from the head tube to low down on seat tube, with perhaps an extra stay each side from seat tube to to frame end between the chain- and seat-stays (or often not) is not a mixte, it is a trapeze frame or a paralellogram frame. The distinct feature of the mixte family is that there are two bars running either side of the seat tube all the way from the head tube to the rear dropout. Here's a case where I analyzed a frame put forward by some less discriminating members of RBT as a mixte, when it was no such thing, and pitifully overpriced to boot, compared to European frames with superior breeding:
https://groups.google.com/forum/#!searchin/rec.bicycles.tech/WHY$20A$20WATERFORD$20BIKE$20IS$20A$20JOKE/rec.bicycles.tech/LqY0UpZTIP0/KW_fz6H3sbQJ

Andre Jute

Andre Jute writes:

It's a very useful, stiff frame, called a mixte.
Here's a version called a Unisex Crossframe Deluxe,
which has been in production almost continuously
since 1936. This one is my Utopia Kranich, made in
this century, but the linked document shows the
original bikes from which my monster was developed:
http://coolmainpress.com/BICYCLING.html And here is
a description of how all that stiffness is applied
to making a superior-handling, very fast, very
secure bike:
http://thorncyclesforum.co.uk/index.php?topic=3798.15

A bicycle with a frame in one dimension, in which
a single tube runs straight from the head tube to
low down on seat tube, with perhaps an extra stay
each side from seat tube to to frame end between the
chain- and seat-stays (or often not) is not a mixte,
it is a trapeze frame or a paralellogram frame.
The distinct feature of the mixte family is that
there are two bars running either side of the seat
tube all the way from the head tube to the rear
dropout. Here's a case where I analyzed a frame put
forward by some less discriminating members of RBT
as a mixte, when it was no such thing, and pitifully
overpriced to boot, compared to European frames with
superior breeding:
https://groups.google.com/forum/#!searchin/rec.bicycles.tech/WHY$20A$20WATERFORD$20BIKE$20IS$20A$20JOKE/rec.bicycles.tech/LqY0UpZTIP0/KW_fz6H3sbQJ

Ha ha, thank you

--
underground experts united
http://user.it.uu.se/~embe8573

On Sunday, July 2, 2017 at 11:26:44 PM UTC+1, Emanuel Berg wrote:
I prefer the closed or diamond frame but for
open frames I think this is my favorite:

http://user.it.uu.se/~embe8573/bike/danish.jpg

It's a very useful, stiff frame, called a mixte. Here's a version called a Unisex Crossframe Deluxe, which has been in production almost continuously since 1936. This one is my Utopia Kranich, made in this century, but the linked document shows the original bikes from which my monster was developed:
http://coolmainpress.com/BICYCLING.html
And here is a description of how all that stiffness is applied to making a superior-handling, very fast, very secure bike:
http://thorncyclesforum.co.uk/index.php?topic=3798.0

A bicycle with a frame in one dimension, in which a single tube runs straight from the head tube to low down on seat tube, with perhaps an extra stay each side from seat tube to to frame end between the chain- and seat-stays (or often not) is not a mixte, it is a trapeze frame or a paralellogram frame. The distinct feature of the mixte family is that there are two bars running either side of the seat tube all the way from the head tube to the rear dropout. Here's a case where I analyzed a frame put forward by some less discriminating members of RBT as a mixte, when it was no such thing, and pitifully overpriced to boot, compared to European frames with superior breeding:
https://groups.google.com/forum/#!searchin/rec.bicycles.tech/WHY$20A$20WATERFORD$20BIKE$20IS$20A$20JOKE/rec.bicycles.tech/LqY0UpZTIP0/KW_fz6H3sbQJ

Andre Jute
Experienced