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Sirect Mount Brakes?



 
 
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  #31  
Old September 13th 19, 01:00 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 10,538
Default Sirect Mount Brakes?

On 9/12/2019 5:13 PM, jbeattie wrote:
On Thursday, September 12, 2019 at 1:40:01 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 9:49 AM, Tom Kunich wrote:
On Wednesday, September 11, 2019 at 1:13:50 PM UTC-7, Frank Krygowski wrote:
On 9/11/2019 3:46 PM, Tom Kunich wrote:
On Tuesday, September 10, 2019 at 8:28:09 PM UTC-7, Frank Krygowski wrote:
On 9/10/2019 6:48 PM, Tom Kunich wrote:
On Sunday, September 8, 2019 at 1:09:54 PM UTC-7, Sir Ridesalot wrote:

I can stop my FULLY LOADED cantilever brake touring bike or my cantilever equipped MTB very well in the dry or in the wet. Indeed the limiting factor of braking with my cantilever brakes isn't the stopping power of the brakes but is the road surface. On many roads and trails my tires will start sliding because the cantilever brakes are capable of locking them up.

Cheers

Well, I have a touring bike and two gravel bikes with cantilevers. I don't ride very hard of the touring bike so it can stop. But on the gravel bikes I switched one to high end V-brakes and the other to hydraulic disks. Coming down steep descents a cantilever required the arm strength of a gorilla.

It could have been your setup, or your choice of brake shoes. As Sheldon
and others have pointed out, one can adjust the mechanical advantage of
many cantilever brakes. Those on our tandem are set up for higher
braking force, by shortening the straddle cable. The tradeoff is less
travel, just as the laws of physics predict, so I have to be sure the
wheels are true. But except for one loaded tour, that hasn't been a
problem.

On that tour, after some serious potholes in one town, the rear wheel
was a bit out of true despite its 48 spokes. Unfortunately, with the
wheel so far back and surrounded by panniers, I couldn't hear the scraping.

I wondered why I felt so blasted tired on the last two days of that
trip. When I got the bike in my basement, I realized the answer.


Frank, contrary to your opposing beliefs I am quite familiar with leverage.

Maybe so. But I have cantilever brakes on most bikes, including the
tandem and the touring bike. Even heavily loaded on mountains or very
steep hills (over 15%) I've always stopped fine. I don't have "the arm
strength of a gorilla."

--
- Frank Krygowski

I assume therefore that you use a very soft shoe compound that wears away rapidly.


On most bikes I use Kool-Stop Salmon pads. Interestingly, our tandem has
grey-colored Kool-Stop pads instead, I don't remember why.

We rode the tandem on today's club ride. The leader asked at the
beginning "Does anyone object to a really steep downhill?" It turned out
to be a 20% grade, judging by my USGS map (0.025" spacing on 10 foot
contour lines on a 1:24,000 map).

Yes, on that downhill I was squeezing hard, but I had no trouble
controlling my speed or coming to a complete stop while still on the slope.

My brake shoes last a long, long time. I think I must brake a lot less
than some people. After all, it does waste energy.


Must be some brutal downhills there in Ohio. https://en.wikipedia.org/wiki/Campbell_Hill_(Ohio)


I've ridden there, with full camping gear. It's not very memorable. But
elevation and gradient are two different things. I set my lifetime
maximum speed record on a hill going down to the Ohio River maybe 40
miles from home. 54 miles per hour, while braking because there was a
car in front of me.

I can get to multiple 20+% grades within about 25 miles of home.

I blew a front tire on a tandem descending this on a hot day: https://www.youtube.com/watch?v=-NPqQptjbF0 That's only 1300 feet of descending. I couldn't imagine a rim-brake tandem with no disc or drag brake on the stuff I ride with my son in SLC -- or riding something like Mt. Hamilton or Diablo down in TK territory. https://media-cdn.tripadvisor.com/me...ad-to-lick.jpg


At the bottom of today's descent - which I held to less than 30 mph, BTW
- I felt my rims, and yes, they were hot. Not "burn my skin" hot, but
certainly well over 100 F.

As I've mentioned, the tandem was built by a guy named Jim Bradford, and
he also sourced and installed the components. One of his many, many
mistakes was giving me a Phil rear hub that was not threaded for a drag
brake, instead of the double threaded hub I'd ordered.

OTOH, he told me he had toured the Alps on another of his tandems with
his fiance'. He claimed he had no drag brake and had no problems.
Perhaps he was telling the truth - I can't say.

--
- Frank Krygowski
Ads
  #32  
Old September 13th 19, 02:40 AM posted to rec.bicycles.tech
jOHN b.
external usenet poster
 
Posts: 2,421
Default Sirect Mount Brakes?

On Thu, 12 Sep 2019 20:00:06 -0400, Frank Krygowski
wrote:

On 9/12/2019 5:13 PM, jbeattie wrote:
On Thursday, September 12, 2019 at 1:40:01 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 9:49 AM, Tom Kunich wrote:
On Wednesday, September 11, 2019 at 1:13:50 PM UTC-7, Frank Krygowski wrote:
On 9/11/2019 3:46 PM, Tom Kunich wrote:
On Tuesday, September 10, 2019 at 8:28:09 PM UTC-7, Frank Krygowski wrote:
On 9/10/2019 6:48 PM, Tom Kunich wrote:
On Sunday, September 8, 2019 at 1:09:54 PM UTC-7, Sir Ridesalot wrote:

I can stop my FULLY LOADED cantilever brake touring bike or my cantilever equipped MTB very well in the dry or in the wet. Indeed the limiting factor of braking with my cantilever brakes isn't the stopping power of the brakes but is the road surface. On many roads and trails my tires will start sliding because the cantilever brakes are capable of locking them up.

Cheers

Well, I have a touring bike and two gravel bikes with cantilevers. I don't ride very hard of the touring bike so it can stop. But on the gravel bikes I switched one to high end V-brakes and the other to hydraulic disks. Coming down steep descents a cantilever required the arm strength of a gorilla.

It could have been your setup, or your choice of brake shoes. As Sheldon
and others have pointed out, one can adjust the mechanical advantage of
many cantilever brakes. Those on our tandem are set up for higher
braking force, by shortening the straddle cable. The tradeoff is less
travel, just as the laws of physics predict, so I have to be sure the
wheels are true. But except for one loaded tour, that hasn't been a
problem.

On that tour, after some serious potholes in one town, the rear wheel
was a bit out of true despite its 48 spokes. Unfortunately, with the
wheel so far back and surrounded by panniers, I couldn't hear the scraping.

I wondered why I felt so blasted tired on the last two days of that
trip. When I got the bike in my basement, I realized the answer.


Frank, contrary to your opposing beliefs I am quite familiar with leverage.

Maybe so. But I have cantilever brakes on most bikes, including the
tandem and the touring bike. Even heavily loaded on mountains or very
steep hills (over 15%) I've always stopped fine. I don't have "the arm
strength of a gorilla."

--
- Frank Krygowski

I assume therefore that you use a very soft shoe compound that wears away rapidly.

On most bikes I use Kool-Stop Salmon pads. Interestingly, our tandem has
grey-colored Kool-Stop pads instead, I don't remember why.

We rode the tandem on today's club ride. The leader asked at the
beginning "Does anyone object to a really steep downhill?" It turned out
to be a 20% grade, judging by my USGS map (0.025" spacing on 10 foot
contour lines on a 1:24,000 map).

Yes, on that downhill I was squeezing hard, but I had no trouble
controlling my speed or coming to a complete stop while still on the slope.

My brake shoes last a long, long time. I think I must brake a lot less
than some people. After all, it does waste energy.


Must be some brutal downhills there in Ohio. https://en.wikipedia.org/wiki/Campbell_Hill_(Ohio)


I've ridden there, with full camping gear. It's not very memorable. But
elevation and gradient are two different things. I set my lifetime
maximum speed record on a hill going down to the Ohio River maybe 40
miles from home. 54 miles per hour, while braking because there was a
car in front of me.

I can get to multiple 20+% grades within about 25 miles of home.

I blew a front tire on a tandem descending this on a hot day: https://www.youtube.com/watch?v=-NPqQptjbF0 That's only 1300 feet of descending. I couldn't imagine a rim-brake tandem with no disc or drag brake on the stuff I ride with my son in SLC -- or riding something like Mt. Hamilton or Diablo down in TK territory. https://media-cdn.tripadvisor.com/me...ad-to-lick.jpg


At the bottom of today's descent - which I held to less than 30 mph, BTW
- I felt my rims, and yes, they were hot. Not "burn my skin" hot, but
certainly well over 100 F.

As I've mentioned, the tandem was built by a guy named Jim Bradford, and
he also sourced and installed the components. One of his many, many
mistakes was giving me a Phil rear hub that was not threaded for a drag
brake, instead of the double threaded hub I'd ordered.

OTOH, he told me he had toured the Alps on another of his tandems with
his fiance'. He claimed he had no drag brake and had no problems.
Perhaps he was telling the truth - I can't say.


On very steep slopes where rim heating might be a problem I use an all
on and all off braking scheme. Brake as strongly as possible to a slow
speed and than release the brakes and allow gravity to accelerate the
bike. than all on braking again, and so on. On the longest and
steepest hill on Phuket, perhaps a kilometer or more of severe down
hill the rims were not hotter than I could comfortably hold my hands
on.
https://www.jamiesphuketblog.com/201...in-phuket.html
A different hill but typical of Phuket hill roads.
--
cheers,

John B.

  #33  
Old September 13th 19, 04:46 AM posted to rec.bicycles.tech
JBeattie
external usenet poster
 
Posts: 5,870
Default Sirect Mount Brakes?

On Thursday, September 12, 2019 at 6:40:26 PM UTC-7, John B. wrote:
On Thu, 12 Sep 2019 20:00:06 -0400, Frank Krygowski
wrote:

On 9/12/2019 5:13 PM, jbeattie wrote:
On Thursday, September 12, 2019 at 1:40:01 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 9:49 AM, Tom Kunich wrote:
On Wednesday, September 11, 2019 at 1:13:50 PM UTC-7, Frank Krygowski wrote:
On 9/11/2019 3:46 PM, Tom Kunich wrote:
On Tuesday, September 10, 2019 at 8:28:09 PM UTC-7, Frank Krygowski wrote:
On 9/10/2019 6:48 PM, Tom Kunich wrote:
On Sunday, September 8, 2019 at 1:09:54 PM UTC-7, Sir Ridesalot wrote:

I can stop my FULLY LOADED cantilever brake touring bike or my cantilever equipped MTB very well in the dry or in the wet. Indeed the limiting factor of braking with my cantilever brakes isn't the stopping power of the brakes but is the road surface. On many roads and trails my tires will start sliding because the cantilever brakes are capable of locking them up.

Cheers

Well, I have a touring bike and two gravel bikes with cantilevers. I don't ride very hard of the touring bike so it can stop. But on the gravel bikes I switched one to high end V-brakes and the other to hydraulic disks. Coming down steep descents a cantilever required the arm strength of a gorilla.

It could have been your setup, or your choice of brake shoes. As Sheldon
and others have pointed out, one can adjust the mechanical advantage of
many cantilever brakes. Those on our tandem are set up for higher
braking force, by shortening the straddle cable. The tradeoff is less
travel, just as the laws of physics predict, so I have to be sure the
wheels are true. But except for one loaded tour, that hasn't been a
problem.

On that tour, after some serious potholes in one town, the rear wheel
was a bit out of true despite its 48 spokes. Unfortunately, with the
wheel so far back and surrounded by panniers, I couldn't hear the scraping.

I wondered why I felt so blasted tired on the last two days of that
trip. When I got the bike in my basement, I realized the answer.


Frank, contrary to your opposing beliefs I am quite familiar with leverage.

Maybe so. But I have cantilever brakes on most bikes, including the
tandem and the touring bike. Even heavily loaded on mountains or very
steep hills (over 15%) I've always stopped fine. I don't have "the arm
strength of a gorilla."

--
- Frank Krygowski

I assume therefore that you use a very soft shoe compound that wears away rapidly.

On most bikes I use Kool-Stop Salmon pads. Interestingly, our tandem has
grey-colored Kool-Stop pads instead, I don't remember why.

We rode the tandem on today's club ride. The leader asked at the
beginning "Does anyone object to a really steep downhill?" It turned out
to be a 20% grade, judging by my USGS map (0.025" spacing on 10 foot
contour lines on a 1:24,000 map).

Yes, on that downhill I was squeezing hard, but I had no trouble
controlling my speed or coming to a complete stop while still on the slope.

My brake shoes last a long, long time. I think I must brake a lot less
than some people. After all, it does waste energy.

Must be some brutal downhills there in Ohio. https://en.wikipedia.org/wiki/Campbell_Hill_(Ohio)


I've ridden there, with full camping gear. It's not very memorable. But
elevation and gradient are two different things. I set my lifetime
maximum speed record on a hill going down to the Ohio River maybe 40
miles from home. 54 miles per hour, while braking because there was a
car in front of me.

I can get to multiple 20+% grades within about 25 miles of home.

I blew a front tire on a tandem descending this on a hot day: https://www.youtube.com/watch?v=-NPqQptjbF0 That's only 1300 feet of descending. I couldn't imagine a rim-brake tandem with no disc or drag brake on the stuff I ride with my son in SLC -- or riding something like Mt. Hamilton or Diablo down in TK territory. https://media-cdn.tripadvisor.com/me...ad-to-lick.jpg


At the bottom of today's descent - which I held to less than 30 mph, BTW
- I felt my rims, and yes, they were hot. Not "burn my skin" hot, but
certainly well over 100 F.

As I've mentioned, the tandem was built by a guy named Jim Bradford, and
he also sourced and installed the components. One of his many, many
mistakes was giving me a Phil rear hub that was not threaded for a drag
brake, instead of the double threaded hub I'd ordered.

OTOH, he told me he had toured the Alps on another of his tandems with
his fiance'. He claimed he had no drag brake and had no problems.
Perhaps he was telling the truth - I can't say.


On very steep slopes where rim heating might be a problem I use an all
on and all off braking scheme. Brake as strongly as possible to a slow
speed and than release the brakes and allow gravity to accelerate the
bike. than all on braking again, and so on. On the longest and
steepest hill on Phuket, perhaps a kilometer or more of severe down
hill the rims were not hotter than I could comfortably hold my hands
on.
https://www.jamiesphuketblog.com/201...in-phuket.html
A different hill but typical of Phuket hill roads.


Dang. Why would you use your brakes on that hill? It's a drag strip. Tuck! I've never had problems with over-heating on a single bike. Rim brakes alone on a tandem with two big riders can be a problem on a long, twisting descent.

-- Jay Beattie.
  #34  
Old September 13th 19, 03:15 PM posted to rec.bicycles.tech
JBeattie
external usenet poster
 
Posts: 5,870
Default Sirect Mount Brakes?

On Thursday, September 12, 2019 at 8:46:14 PM UTC-7, jbeattie wrote:
On Thursday, September 12, 2019 at 6:40:26 PM UTC-7, John B. wrote:
On Thu, 12 Sep 2019 20:00:06 -0400, Frank Krygowski
wrote:

On 9/12/2019 5:13 PM, jbeattie wrote:
On Thursday, September 12, 2019 at 1:40:01 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 9:49 AM, Tom Kunich wrote:
On Wednesday, September 11, 2019 at 1:13:50 PM UTC-7, Frank Krygowski wrote:
On 9/11/2019 3:46 PM, Tom Kunich wrote:
On Tuesday, September 10, 2019 at 8:28:09 PM UTC-7, Frank Krygowski wrote:
On 9/10/2019 6:48 PM, Tom Kunich wrote:
On Sunday, September 8, 2019 at 1:09:54 PM UTC-7, Sir Ridesalot wrote:

I can stop my FULLY LOADED cantilever brake touring bike or my cantilever equipped MTB very well in the dry or in the wet. Indeed the limiting factor of braking with my cantilever brakes isn't the stopping power of the brakes but is the road surface. On many roads and trails my tires will start sliding because the cantilever brakes are capable of locking them up.

Cheers

Well, I have a touring bike and two gravel bikes with cantilevers. I don't ride very hard of the touring bike so it can stop. But on the gravel bikes I switched one to high end V-brakes and the other to hydraulic disks. Coming down steep descents a cantilever required the arm strength of a gorilla.

It could have been your setup, or your choice of brake shoes. As Sheldon
and others have pointed out, one can adjust the mechanical advantage of
many cantilever brakes. Those on our tandem are set up for higher
braking force, by shortening the straddle cable. The tradeoff is less
travel, just as the laws of physics predict, so I have to be sure the
wheels are true. But except for one loaded tour, that hasn't been a
problem.

On that tour, after some serious potholes in one town, the rear wheel
was a bit out of true despite its 48 spokes. Unfortunately, with the
wheel so far back and surrounded by panniers, I couldn't hear the scraping.

I wondered why I felt so blasted tired on the last two days of that
trip. When I got the bike in my basement, I realized the answer..


Frank, contrary to your opposing beliefs I am quite familiar with leverage.

Maybe so. But I have cantilever brakes on most bikes, including the
tandem and the touring bike. Even heavily loaded on mountains or very
steep hills (over 15%) I've always stopped fine. I don't have "the arm
strength of a gorilla."

--
- Frank Krygowski

I assume therefore that you use a very soft shoe compound that wears away rapidly.

On most bikes I use Kool-Stop Salmon pads. Interestingly, our tandem has
grey-colored Kool-Stop pads instead, I don't remember why.

We rode the tandem on today's club ride. The leader asked at the
beginning "Does anyone object to a really steep downhill?" It turned out
to be a 20% grade, judging by my USGS map (0.025" spacing on 10 foot
contour lines on a 1:24,000 map).

Yes, on that downhill I was squeezing hard, but I had no trouble
controlling my speed or coming to a complete stop while still on the slope.

My brake shoes last a long, long time. I think I must brake a lot less
than some people. After all, it does waste energy.

Must be some brutal downhills there in Ohio. https://en.wikipedia.org/wiki/Campbell_Hill_(Ohio)

I've ridden there, with full camping gear. It's not very memorable. But
elevation and gradient are two different things. I set my lifetime
maximum speed record on a hill going down to the Ohio River maybe 40
miles from home. 54 miles per hour, while braking because there was a
car in front of me.

I can get to multiple 20+% grades within about 25 miles of home.

I blew a front tire on a tandem descending this on a hot day: https://www.youtube.com/watch?v=-NPqQptjbF0 That's only 1300 feet of descending. I couldn't imagine a rim-brake tandem with no disc or drag brake on the stuff I ride with my son in SLC -- or riding something like Mt. Hamilton or Diablo down in TK territory. https://media-cdn.tripadvisor.com/me...ad-to-lick.jpg

At the bottom of today's descent - which I held to less than 30 mph, BTW
- I felt my rims, and yes, they were hot. Not "burn my skin" hot, but
certainly well over 100 F.

As I've mentioned, the tandem was built by a guy named Jim Bradford, and
he also sourced and installed the components. One of his many, many
mistakes was giving me a Phil rear hub that was not threaded for a drag
brake, instead of the double threaded hub I'd ordered.

OTOH, he told me he had toured the Alps on another of his tandems with
his fiance'. He claimed he had no drag brake and had no problems.
Perhaps he was telling the truth - I can't say.


On very steep slopes where rim heating might be a problem I use an all
on and all off braking scheme. Brake as strongly as possible to a slow
speed and than release the brakes and allow gravity to accelerate the
bike. than all on braking again, and so on. On the longest and
steepest hill on Phuket, perhaps a kilometer or more of severe down
hill the rims were not hotter than I could comfortably hold my hands
on.
https://www.jamiesphuketblog.com/201...in-phuket.html
A different hill but typical of Phuket hill roads.


Dang. Why would you use your brakes on that hill? It's a drag strip. Tuck! I've never had problems with over-heating on a single bike. Rim brakes alone on a tandem with two big riders can be a problem on a long, twisting descent.

-- Jay Beattie.


Correction, no overheating on a single with the exception of over-heating tubular rims and having glue soften/tire squirm on a long descent. It was a hot day, and I was doing a lot of braking. Braking was unaffected.

-- Jay Beattie.



  #35  
Old September 13th 19, 04:18 PM posted to rec.bicycles.tech
Tom Kunich[_5_]
external usenet poster
 
Posts: 1,231
Default Sirect Mount Brakes?

On Thursday, September 12, 2019 at 5:00:11 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 5:13 PM, jbeattie wrote:
On Thursday, September 12, 2019 at 1:40:01 PM UTC-7, Frank Krygowski wrote:
On 9/12/2019 9:49 AM, Tom Kunich wrote:
On Wednesday, September 11, 2019 at 1:13:50 PM UTC-7, Frank Krygowski wrote:
On 9/11/2019 3:46 PM, Tom Kunich wrote:
On Tuesday, September 10, 2019 at 8:28:09 PM UTC-7, Frank Krygowski wrote:
On 9/10/2019 6:48 PM, Tom Kunich wrote:
On Sunday, September 8, 2019 at 1:09:54 PM UTC-7, Sir Ridesalot wrote:

I can stop my FULLY LOADED cantilever brake touring bike or my cantilever equipped MTB very well in the dry or in the wet. Indeed the limiting factor of braking with my cantilever brakes isn't the stopping power of the brakes but is the road surface. On many roads and trails my tires will start sliding because the cantilever brakes are capable of locking them up.

Cheers

Well, I have a touring bike and two gravel bikes with cantilevers.. I don't ride very hard of the touring bike so it can stop. But on the gravel bikes I switched one to high end V-brakes and the other to hydraulic disks. Coming down steep descents a cantilever required the arm strength of a gorilla.

It could have been your setup, or your choice of brake shoes. As Sheldon
and others have pointed out, one can adjust the mechanical advantage of
many cantilever brakes. Those on our tandem are set up for higher
braking force, by shortening the straddle cable. The tradeoff is less
travel, just as the laws of physics predict, so I have to be sure the
wheels are true. But except for one loaded tour, that hasn't been a
problem.

On that tour, after some serious potholes in one town, the rear wheel
was a bit out of true despite its 48 spokes. Unfortunately, with the
wheel so far back and surrounded by panniers, I couldn't hear the scraping.

I wondered why I felt so blasted tired on the last two days of that
trip. When I got the bike in my basement, I realized the answer.


Frank, contrary to your opposing beliefs I am quite familiar with leverage.

Maybe so. But I have cantilever brakes on most bikes, including the
tandem and the touring bike. Even heavily loaded on mountains or very
steep hills (over 15%) I've always stopped fine. I don't have "the arm
strength of a gorilla."

--
- Frank Krygowski

I assume therefore that you use a very soft shoe compound that wears away rapidly.

On most bikes I use Kool-Stop Salmon pads. Interestingly, our tandem has
grey-colored Kool-Stop pads instead, I don't remember why.

We rode the tandem on today's club ride. The leader asked at the
beginning "Does anyone object to a really steep downhill?" It turned out
to be a 20% grade, judging by my USGS map (0.025" spacing on 10 foot
contour lines on a 1:24,000 map).

Yes, on that downhill I was squeezing hard, but I had no trouble
controlling my speed or coming to a complete stop while still on the slope.

My brake shoes last a long, long time. I think I must brake a lot less
than some people. After all, it does waste energy.


Must be some brutal downhills there in Ohio. https://en.wikipedia.org/wiki/Campbell_Hill_(Ohio)


I've ridden there, with full camping gear. It's not very memorable. But
elevation and gradient are two different things. I set my lifetime
maximum speed record on a hill going down to the Ohio River maybe 40
miles from home. 54 miles per hour, while braking because there was a
car in front of me.

I can get to multiple 20+% grades within about 25 miles of home.

I blew a front tire on a tandem descending this on a hot day: https://www.youtube.com/watch?v=-NPqQptjbF0 That's only 1300 feet of descending. I couldn't imagine a rim-brake tandem with no disc or drag brake on the stuff I ride with my son in SLC -- or riding something like Mt. Hamilton or Diablo down in TK territory. https://media-cdn.tripadvisor.com/me...ad-to-lick.jpg


At the bottom of today's descent - which I held to less than 30 mph, BTW
- I felt my rims, and yes, they were hot. Not "burn my skin" hot, but
certainly well over 100 F.

As I've mentioned, the tandem was built by a guy named Jim Bradford, and
he also sourced and installed the components. One of his many, many
mistakes was giving me a Phil rear hub that was not threaded for a drag
brake, instead of the double threaded hub I'd ordered.

OTOH, he told me he had toured the Alps on another of his tandems with
his fiance'. He claimed he had no drag brake and had no problems.
Perhaps he was telling the truth - I can't say.

--
- Frank Krygowski


I wonder what goes on in driver's minds. Yesterday I did a 30 mile recovery ride because I have a metric on Saturday. On the way out of the canyon just before the fast downhill with a lot of turns in it a car passes me and I have to brake the entire way - 2 miles.
  #36  
Old September 13th 19, 04:41 PM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 10,538
Default Sirect Mount Brakes?

On 9/13/2019 11:18 AM, Tom Kunich wrote:

I wonder what goes on in driver's minds. Yesterday I did a 30 mile recovery ride because I have a metric on Saturday. On the way out of the canyon just before the fast downhill with a lot of turns in it a car passes me and I have to brake the entire way - 2 miles.


Most motorists seem to think there's a law saying they MUST pass every
bicyclist, and must do it immediately.

OTOH, on yesterday's club ride one woman stayed behind us for at least
three minutes on a straight, empty road, even though we were waving her
around. She didn't pass until the road changed from two lanes to four
lanes.

I think driving a car competently is at the top limit of human
capability. Everyone thinks they can do it, but very few can do it well.


--
- Frank Krygowski
  #37  
Old September 13th 19, 05:48 PM posted to rec.bicycles.tech
Sir Ridesalot
external usenet poster
 
Posts: 5,270
Default Sirect Mount Brakes?

On Friday, 13 September 2019 11:42:02 UTC-4, Frank Krygowski wrote:
On 9/13/2019 11:18 AM, Tom Kunich wrote:

I wonder what goes on in driver's minds. Yesterday I did a 30 mile recovery ride because I have a metric on Saturday. On the way out of the canyon just before the fast downhill with a lot of turns in it a car passes me and I have to brake the entire way - 2 miles.


Most motorists seem to think there's a law saying they MUST pass every
bicyclist, and must do it immediately.

OTOH, on yesterday's club ride one woman stayed behind us for at least
three minutes on a straight, empty road, even though we were waving her
around. She didn't pass until the road changed from two lanes to four
lanes.

I think driving a car competently is at the top limit of human
capability. Everyone thinks they can do it, but very few can do it well.


--
- Frank Krygowski


My dad didn't even like being behind another car on the road let alone a bicycle. There were times when he'd pass a car and t he pass would be hair raising because of an oncoming vehicle.

Cheers
  #38  
Old September 14th 19, 03:41 AM posted to rec.bicycles.tech
Joy Beeson
external usenet poster
 
Posts: 1,638
Default Sirect Mount Brakes?

On Fri, 13 Sep 2019 08:40:21 +0700, John B.
wrote:

On very steep slopes where rim heating might be a problem I use an all
on and all off braking scheme. Brake as strongly as possible to a slow
speed and than release the brakes and allow gravity to accelerate the
bike. than all on braking again, and so on. On the longest and
steepest hill on Phuket, perhaps a kilometer or more of severe down
hill the rims were not hotter than I could comfortably hold my hands
on.
https://www.jamiesphuketblog.com/201...in-phuket.html
A different hill but typical of Phuket hill roads.


That was the technique I used in Albany County. I would stop every
mile or so to feel my rims, and never found them hot.

--
Joy Beeson
joy beeson at comcast dot net
http://wlweather.net/PAGEJOY/

  #39  
Old September 14th 19, 04:22 AM posted to rec.bicycles.tech
jOHN b.
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Posts: 2,421
Default Sirect Mount Brakes?

On Fri, 13 Sep 2019 22:41:08 -0400, Joy Beeson
wrote:

On Fri, 13 Sep 2019 08:40:21 +0700, John B.
wrote:

On very steep slopes where rim heating might be a problem I use an all
on and all off braking scheme. Brake as strongly as possible to a slow
speed and than release the brakes and allow gravity to accelerate the
bike. than all on braking again, and so on. On the longest and
steepest hill on Phuket, perhaps a kilometer or more of severe down
hill the rims were not hotter than I could comfortably hold my hands
on.
https://www.jamiesphuketblog.com/201...in-phuket.html
A different hill but typical of Phuket hill roads.


That was the technique I used in Albany County. I would stop every
mile or so to feel my rims, and never found them hot.


If we want to be scientific maybe we can get Frank to calculate
friction heating of the rim during braking and heat dissipation when
coasting :-)
--
cheers,

John B.

  #40  
Old September 14th 19, 06:37 AM posted to rec.bicycles.tech
Chalo
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Posts: 5,093
Default Sirect Mount Brakes?

Frank Krygowski wrote:

I think driving a car competently is at the top limit of human
capability. Everyone thinks they can do it, but very few can do it well.


Nobody can do it so well that others should be obligated to share the road with them while they do.
 




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