Lost parallelograms?

Ivar Hesselager said:

I have been taking a close look at V-brakes, since those that sit on my
winterbike have become slow, craving frequent adjustment and service.
Looking in last years catalogues I chose Deore XT with the model no.
BR-M760. The reason for that choice was the technological advantage of
the parallelogram pushing the brakepad to the rim in a 90 degree angle -
plus the "Ultegra level" price of luxory within reason. (44 euro/pair)

But these brakes turned out to be out of the shelves of many of the
shops I normally deal with. They offer a new 2008 version of the Deore
XT V-brake - WITHOUT the parallelogram. If I want paralellogram in a
2008 version, I have to move up to the XTR model, which to me is luxory
beyond reason. (100 euros/pair)

If I keep looking I suppose I will be able to find last years luxory of
XT brakes with parallelograms. Byt why is Shimano stepping down instead
of up in the 2008 version of Deore XT V-brakes.

It is an unwritten rule, that there must be a little progress in every
years new model, and that the technology spreads down from the top to
the secondary groupsets.

Is anything wron with the parallelogram technology? Why has Shimano
stepped down to the old more simple technology?

In theory, as you note, it seemed cool if possibly excessive.

In practice they have not proved durable nor any better at stopping a bike.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

On Oct 14, 6:16 pm, "Ivar Hesselager" <[email hidden]>

Quoted message said:

It is an unwritten rule, that there must be a little progress in every
years new model, and that the technology spreads down from the top to the
secondary groupsets.

With Shimano (and others) I think a better statement would be: It is
an unwritten rule that a new gimmick will be tried every year. Some
gimmicks will entice enough buyers to continue in production. Other
gimmicks will not, and will be replaced by new gimmicks.

Shimano has a long history of such gimmicks.

Quoted message said:

Is anything wron with the parallelogram technology?

There was no significant advantage. And my one friend who bought
those was troubled by embarrassing brake squeal.

Quoted message said:

Why has Shimano
stepped down to the old more simple technology?

The main reason was probably that it didn't attract enough buyers.

- Frank Krygowski

Try looking at Magura rim brakes, parallel push, nice "feel", and very low
maintenance. I've got HS11 on my tourer and I'm well pleased.

"Steve Watkin" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Try looking at Magura rim brakes, parallel push, nice "feel", and very low
maintenance. I've got HS11 on my tourer and I'm well pleased.

HS33 have more lever travel per pad travel, so offer stronger braking. Given
that the HS11/66 have loads of lever travel available/spare, I'd seriously
consider going to the 33s.

cheers,
clive

Clive George said:

"Steve Watkin" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Try looking at Magura rim brakes, parallel push, nice "feel", and very low
maintenance. I've got HS11 on my tourer and I'm well pleased.

HS33 have more lever travel per pad travel, so offer stronger braking.

....for some definitions of "stronger"...

"_" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Clive George said:

"Steve Watkin" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Try looking at Magura rim brakes, parallel push, nice "feel", and very
low
maintenance. I've got HS11 on my tourer and I'm well pleased.

HS33 have more lever travel per pad travel, so offer stronger braking.

...for some definitions of "stronger"...

In adverse conditions, they will offer additional force which can be used.
The reduced load on the hands also aids control.

Happy now?

clive

Ivar Hesselager said:

I have been taking a close look at V-brakes, since those that sit on my
winterbike have become slow, craving frequent adjustment and service.
Looking in last years catalogues I chose Deore XT with the model no.
BR-M760. The reason for that choice was the technological advantage of
the parallelogram pushing the brakepad to the rim in a 90 degree angle -
plus the "Ultegra level" price of luxory within reason. (44 euro/pair)

But these brakes turned out to be out of the shelves of many of the
shops I normally deal with. They offer a new 2008 version of the Deore
XT V-brake - WITHOUT the parallelogram. If I want paralellogram in a
2008 version, I have to move up to the XTR model, which to me is luxory
beyond reason. (100 euros/pair)

If I keep looking I suppose I will be able to find last years luxory of
XT brakes with parallelograms. Byt why is Shimano stepping down instead
of up in the 2008 version of Deore XT V-brakes.

It is an unwritten rule, that there must be a little progress in every
years new model, and that the technology spreads down from the top to
the secondary groupsets.

Is anything wron with the parallelogram technology? Why has Shimano
stepped down to the old more simple technology?

Ivar of Denmark

It is no step down. They realize that now.

Lou
--
Posted by news://news.nb.nu (http://www.nb.nu)

HS33 have more lever travel per pad travel, so offer stronger braking. Given
that the HS11/66 have loads of lever travel available/spare, I'd seriously
consider going to the 33s.

______________________________________________

Are you sure? I was not aware of this. I thought they were both the same.
But if you are right that would go some way to explaining the differance in
price.
Must say the HS11s have plenty of pad movement and good modulation. Never
felt any different to the HS33s I've tried.

"Steve Watkin" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

HS33 have more lever travel per pad travel, so offer stronger braking.
Given
that the HS11/66 have loads of lever travel available/spare, I'd seriously
consider going to the 33s.

______________________________________________

Are you sure? I was not aware of this. I thought they were both the same.
But if you are right that would go some way to explaining the differance
in price.
Must say the HS11s have plenty of pad movement and good modulation. Never
felt any different to the HS33s I've tried.

The HS33 have slightly less (25%?) pad movement, purely because their master
cylinders are a bit smaller. I think they realised they were being a bit
conservative with their original brakes (11/22/66), allowing more pad
movement than is necessary, and could afford to change the mechanical
advantage a bit.

You'll note I said "seriously consider" - doesn't mean you actually need to
do it :-)

(Pity they never did the same for the 66s, and, worse, dropped the line
completely. I wouldn't mind a bit more mechanical advantage.)

cheers,
clive

In article <op.tz7j6km81c91w4@d3q5wk2j>,
"Ivar Hesselager" <[email hidden]> wrote:
snip

Quoted message said:

Is anything wron with the parallelogram technology? Why has Shimano
stepped down to the old more simple technology?

My XT front brakes, from 2003, didn't just squeal, but rather provided a
veritable organ concert, with both high and low-pitched tones. I ride a
lot near alpine meadows, and didn't want to scare the cows. Nothing
helped except giving up and changing to cheap Deore brakes.

--
Ned Mantei
Zurich, Switzerland

Thanks for warnings, theories and suggestions. I think a set of Magura HS
11 (or even 33) can be justified on my winter commuting bicycle, which is
supposed to bring me trough 2500 slippery kilometres of Nordic darkness
between November and April. I hope my Mrs will understand the need of
investing 140 euros in safety equipment.

It's an amazing amount of insight that can be collected in this newsgroup
within a few hours.
I appreciate that.

Ivar of Denmark