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#42
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Shimano Headset
Joerg writes:
Hint: A repetitive scraping noise is usually a sign of imminent wear-out of some part Noise from a bike can be almost anything! Spokes loose by the nipples, wheel reflex loose, chain to the chain guard after a stay has been aligned... People often think it is the crank. I don't know why. Maybe the frame acts like a drum so the sound seemingly stems from the center. Sometimes people use 5-56/WD-40 or CRC Bike Oil on a part where there are balls and grease. This improves the "roll" a lot in an instant! But something else happens as well. Maybe too much of the old grease is removed, or fragments are carried into the machinery. Because some worrying noise appears and it can be there for many days. -- underground experts united http://user.it.uu.se/~embe8573 |
#43
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Shimano Headset
Joerg writes:
Hint: A repetitive scraping noise is usually a sign of imminent wear-out of some part Noise from a bike can be almost anything! Spokes loose by the nipples, wheel reflex loose, chain to the chain guard after a stay has been aligned, ... People often think it is the crank. I don't know why. Maybe the frame acts like a drum so the sound seemingly stems from the center. Sometimes people use 5-56/WD-40 or CRC Bike Oil on a part where there are balls and grease. This improves the "roll" a lot in an instant! But something else happens as well. Maybe too much of the old grease is removed, or fragments are carried into the machinery. Because some worrying noise appears and it can be there for many days. -- underground experts united .... http://user.it.uu.se/~embe8573 Emacs Gnus Blogomatic ......... http://user.it.uu.se/~embe8573/blogomatic - so far: 26 Blogomatic articles - |
#44
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Shimano Headset
On Sunday, May 14, 2017 at 7:39:56 AM UTC-7, wrote:
On Saturday, May 13, 2017 at 3:43:06 PM UTC-7, jbeattie wrote: On Saturday, May 13, 2017 at 1:08:38 PM UTC-7, wrote: snip story telling I also remember the exact moment I decided I did not want to be a doctor -- doing CPR on a baby and recalling the relief I felt when handing the baby off to an ER doctor. I had a soft spot for babies. I was much more accustomed to adults dying off. Jay - You couldn't be suggesting that you let a friend die rather than try anything because it is usually ineffective in the long run? You're conflating allowing a person to die with refusing to break ribs on a dead person. I did CPR on a lot of dead people who remained so. I had little or no expectation of a positive outcome in many cases -- but there was at least some chance in my opinion. My partner or I could always pronounce death, which we did on occasion -- usually when someone was way gone or in pieces. Even if we started CPR and transported, some doctors were more "realistic" than others and were quicker to pronounce death. Some doctors would shock a corps because they wanted the practice -- one bad hospital comes to mind. And of course, some people did come back, but I wasn't privy to their long-term outcomes. NOBODY just sat up in the back of the ambulance and shook it off, like on T.V. Most of the people who came back coded first in the ER or had witnessed heart attacks near a fire station or near someone who started CPR and who were also close to a (good) hospital. But to your point: if I found someone collapsed on a trail twenty miles from the nearest town -- pupils fixed and dilated, no pulse, no respiration, cool to the touch and cement-colored with dried drool at the corner of his mouth, no, I would not start compressions. Back in the day, I would get on the radio and call 10-55 10-19. Go on to the next call. -- Jay Beattie. This time around you're suggesting that we should try to revive dead people. We both know that cardiac arrest is not treatable after a minute or so, and that if you don't see a person having that arrest treating him is close to impossible. But if you so see a person have that arrest you must treat him. I didn't know how to do CPR and watched my good friend die. It wasn't pretty. Rationally, there is no reason for starting CPR on someone who has been in asystole for ten minutes because brain death is certain (except in super cold conditions), but in the old days with no telemetry, you couldn't be sure if and when the heart stopped completely, and since people were standing around expecting you to do something, we did. Often the local FD started CPR, and it wasn't likely that we would stop it. The FD was now invested, and we worked with them every day. Independent of the time to start CPR is the time to quit, which, IIRC, was usually about 30-45 minutes in the hospital.. You should learn CPR. It's not hard, and recent studies show that you can get a good outcome even without ventilation -- assuming you're put off by the mouth-to-mouth thing. I get re-certified every so often at work and am amazed at how the technique has changed over the years, particular for one-person CPR. I'm also certified on an AED, although I've never used one and would have to read the instructions if someone dropped dead at work. Anyway, like I said, CPR can save lives in the case of witnessed heart attacks. That's when it matters -- the guy who clutches his chest and drops dead in front of you. -- Jay Beattie. |
#45
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Shimano Headset
On 2017-05-14 09:23, jbeattie wrote:
On Sunday, May 14, 2017 at 7:39:56 AM UTC-7, wrote: On Saturday, May 13, 2017 at 3:43:06 PM UTC-7, jbeattie wrote: On Saturday, May 13, 2017 at 1:08:38 PM UTC-7, wrote: snip story telling I also remember the exact moment I decided I did not want to be a doctor -- doing CPR on a baby and recalling the relief I felt when handing the baby off to an ER doctor. I had a soft spot for babies. I was much more accustomed to adults dying off. Jay - You couldn't be suggesting that you let a friend die rather than try anything because it is usually ineffective in the long run? You're conflating allowing a person to die with refusing to break ribs on a dead person. I did CPR on a lot of dead people who remained so. I had little or no expectation of a positive outcome in many cases -- but there was at least some chance in my opinion. My partner or I could always pronounce death, which we did on occasion -- usually when someone was way gone or in pieces. Even if we started CPR and transported, some doctors were more "realistic" than others and were quicker to pronounce death. Some doctors would shock a corps because they wanted the practice -- one bad hospital comes to mind. And of course, some people did come back, but I wasn't privy to their long-term outcomes. NOBODY just sat up in the back of the ambulance and shook it off, like on T.V. Most of the people who came back coded first in the ER or had witnessed heart attacks near a fire station or near someone who started CPR and who were also close to a (good) hospital. But to your point: if I found someone collapsed on a trail twenty miles from the nearest town -- pupils fixed and dilated, no pulse, no respiration, cool to the touch and cement-colored with dried drool at the corner of his mouth, no, I would not start compressions. Back in the day, I would get on the radio and call 10-55 10-19. Go on to the next call. -- Jay Beattie. This time around you're suggesting that we should try to revive dead people. We both know that cardiac arrest is not treatable after a minute or so, and that if you don't see a person having that arrest treating him is close to impossible. But if you so see a person have that arrest you must treat him. I didn't know how to do CPR and watched my good friend die. It wasn't pretty. Rationally, there is no reason for starting CPR on someone who has been in asystole for ten minutes because brain death is certain (except in super cold conditions), but in the old days with no telemetry, you couldn't be sure if and when the heart stopped completely, and since people were standing around expecting you to do something, we did. Often the local FD started CPR, and it wasn't likely that we would stop it. The FD was now invested, and we worked with them every day. Independent of the time to start CPR is the time to quit, which, IIRC, was usually about 30-45 minutes in the hospital. You should learn CPR. It's not hard, and recent studies show that you can get a good outcome even without ventilation -- assuming you're put off by the mouth-to-mouth thing. I get re-certified every so often at work and am amazed at how the technique has changed over the years, particular for one-person CPR. I'm also certified on an AED, although I've never used one and would have to read the instructions if someone dropped dead at work. During my last refresher course I was also surprised how much had changed and the nice thing is that they offered a tacked-on AED instruction class. So I took that as well. ... Anyway, like I said, CPR can save lives in the case of witnessed heart attacks. That's when it matters -- the guy who clutches his chest and drops dead in front of you. Also, memorize the locations where the AEDs are in buildings you frequently visit or where you work. When things happen every second counts. What can be helpful would be locator apps like this although not so much for me because I do not have a smart phone: http://www.heartsafe.org.uk/AED-Locations http://www.firstaidcorps.org/locate-aeds-near-you/ -- Regards, Joerg http://www.analogconsultants.com/ |
#46
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Shimano Headset
On Sunday, May 14, 2017 at 10:24:49 AM UTC-4, Joerg wrote:
Snipped Hint: A repetitive scraping noise is usually a sign of imminent wear-out of some part. A derailer hanger coming apart on the 20mi home isn't so cool because that means hoofing the remaining miles. As unbelievable as it may sound I tend to invest that extra minute or two to prevent such things. -- Regards, Joerg http://www.analogconsultants.com/ If you carried a chain-breaker you could shorten your chain when your derailler hanger comes apart and then ride that 20mi home on the single gear. Then you wouldn't have to worry about being stalked by mountain lions. Cheers |
#47
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Shimano Headset
On 2017-05-14 09:37, Sir Ridesalot wrote:
On Sunday, May 14, 2017 at 10:24:49 AM UTC-4, Joerg wrote: Snipped Hint: A repetitive scraping noise is usually a sign of imminent wear-out of some part. A derailer hanger coming apart on the 20mi home isn't so cool because that means hoofing the remaining miles. As unbelievable as it may sound I tend to invest that extra minute or two to prevent such things. -- Regards, Joerg http://www.analogconsultants.com/ If you carried a chain-breaker you could shorten your chain when your derailler hanger comes apart and then ride that 20mi home on the single gear. Then you wouldn't have to worry about being stalked by mountain lions. I can do that without a chain breaker. However, Where I ride with my MTB single gear won't help much. You'd be stuck all the time. I use almost the whole gear range on every ride, jumping 4-6 gears all the time because it has to happen fast. -- Regards, Joerg http://www.analogconsultants.com/ |
#48
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Shimano Headset
On Sunday, May 14, 2017 at 1:07:57 PM UTC-4, Joerg wrote:
On 2017-05-14 09:37, Sir Ridesalot wrote: On Sunday, May 14, 2017 at 10:24:49 AM UTC-4, Joerg wrote: Snipped Hint: A repetitive scraping noise is usually a sign of imminent wear-out of some part. A derailer hanger coming apart on the 20mi home isn't so cool because that means hoofing the remaining miles. As unbelievable as it may sound I tend to invest that extra minute or two to prevent such things. -- Regards, Joerg http://www.analogconsultants.com/ If you carried a chain-breaker you could shorten your chain when your derailler hanger comes apart and then ride that 20mi home on the single gear. Then you wouldn't have to worry about being stalked by mountain lions. I can do that without a chain breaker. However, Where I ride with my MTB single gear won't help much. You'd be stuck all the time. I use almost the whole gear range on every ride, jumping 4-6 gears all the time because it has to happen fast. -- Regards, Joerg http://www.analogconsultants.com/ You could simply put the chain onto a low gear and ride a bit slower. It'd still beat walking. But then again in your corner of the world nothing easy nor sensible (such as carrying a small multi-tool with a chain breaker on it) works. You'd rather scrounge rocks and rusty nails. Cheers |
#49
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Shimano Headset
On Sun, 14 May 2017 07:33:02 -0700 (PDT), wrote:
On Saturday, May 13, 2017 at 1:53:00 PM UTC-7, Joerg wrote: On 2017-05-13 13:05, wrote: On Friday, May 12, 2017 at 9:57:35 PM UTC-7, John B. Slocomb wrote: On Fri, 12 May 2017 08:23:02 -0700 (PDT), Sir Ridesalot wrote: On Thursday, May 11, 2017 at 10:06:04 AM UTC-4, Joerg wrote: Snipped But then, to one who habitually uses a nail and a rock as a chain tool the use of proper tools is probably a mystery. Try to differentiate between an outdoors emergency situation and the workshop in the garage. It's not that difficult. - Regards, Joerg http://www.analogconsultants.com/ Which is hy mose of us carry a small tool repair kit that includes a chain-breaker. That way a broken chain isn't an ememrgency and a repair only takes a few seconds. After all seconds count when you're beig stalked by mountain lions or other hungry critters doesn't it? For someone who either breaks chains a lot or often comes across people with a broken chain (bother very rare where I ride even on the technical trails) it ONLY makes sense to have a chain breaker and spare link(s)and quick-link WITH YOU. To be honest using a rock and rusty nail to repair a chain in the field sounds like something an armchair bicyclist would think up. Such a repaired chain would most likely fail again after only a short distance. Believe it or not there's good reasons why chain breakers are used to fix a chain. Cheers Out of curiosity I weighed and measured the chain tool that I carry in my bike tool kit. It is 2-1/2 inches in length and 2-1/8 inches in height. 1/2 inch thick, at its thickest, and weighs 2.6 ounces. It works with chains up to and including 10 speed chains (I don't own an 11 speed). Frankly, as a broken chain immobilizes the bicycle I can see no logic in not carrying it. Since I have never once had a broken chain nor seen one I cannot see any requirement to carry such a tool. You never had a chain suck resulting in a pretzeled or corkscrewed chain? Then you probably haven't ridden much singletrack. Sometimes the worst part of the "pretzeling" has to be surgically removed in the field, upon which the chain is rather short but at least one can get home without having to hoof it. https://www.youtube.com/watch?v=EftEeU_qGOg Even though I ride offroad 50% of the time it happens so rarely that I don't see an urgency in adding a chain breaker to my on-board kit. Besides, you need to find some rocks anyhow because the rest of the chain usually needs straightening so it passes the derailer hanger without an awful grinding noise every time. A chain breaker is one of the tools easily improvised. The "McGyver Deluxe Edition" consists of a pin (used to punch out the chain pin), a nut or sawed off little chunk of pipe slightly larger and long enough, and some stiff wire. The end of the wire gets fashioned into a loop that holds the pin well. That is best done before placing it in the tool kit. Just roll it 2-3 times around a drill bit shaft slightly smaller than the pin. The wire can also be used to tie stuff that came off. Brake lines and such. Now a storm of outrage will likely break loose on this NG because this McGyver tool ... gasp ... doesn't even have a flashing LED. In the olden days road bike chains didn't come with missing links. The only way to take them off was to punch out a pin. I have changed lots of chains just using pin, nut and hammer. I don't know how I made it into my 50's without a chain breaker but somehow I did. ... Yesterday I did 55 miles and 2500 feet of climbing with some of it pretty steep ~12%. There were fore of us there and the dirt encrusted on the bikes showed a certain lack of careful maintenance. No one had any problems. I have been carrying all these tools around for the last 6 years and the only one's I've used are the tire repair tools. It's more for mountain bikers. I have my tools in a waist pack. That also contains cell phone, keys, wallet, pencil and, yes, no kidding, a small leash. That leash has helped bring some dogs home over the years. The road bike also has a towing rope in the bottom of the left pannier. MTB and road bike have identical panniers (Nashbar Daytrekker) and I can simply pull the waist pack out of one bike and slide it into the other in seconds if I decide to switch. This also avoids the worst case scenario where you find a nice brewpub and then discover that you left the wallet in the other bike. -- Regards, Joerg http://www.analogconsultants.com/ I still don't follow any of this. I rode Mt. Bikes since they were first developed. I've ridden road bikes roughly forever. The chains that I've seen break didn't break - they popped one side of a link loose. And this was because they weren't assembled properly. I see no requirements for a chain breaker. And I haven't been disappointed by not having one. I've had a couple chains break where one of thelink plates actually cracked in two. Ine cracked between the pins, and one split the eye where the pin goes through. Both were on bikes that had not been well maintained and the chains had been freed up from being rusted stiff. No idea what had been used to free up the chain, but the way they broke suggested hydrogen embrittlement. |
#50
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Shimano Headset
On Sun, 14 May 2017 07:42:40 -0700 (PDT), wrote:
On Saturday, May 13, 2017 at 8:43:29 PM UTC-7, John B. Slocomb wrote: On Sat, 13 May 2017 13:05:08 -0700 (PDT), wrote: On Friday, May 12, 2017 at 9:57:35 PM UTC-7, John B. Slocomb wrote: On Fri, 12 May 2017 08:23:02 -0700 (PDT), Sir Ridesalot wrote: On Thursday, May 11, 2017 at 10:06:04 AM UTC-4, Joerg wrote: Snipped But then, to one who habitually uses a nail and a rock as a chain tool the use of proper tools is probably a mystery. Try to differentiate between an outdoors emergency situation and the workshop in the garage. It's not that difficult. - Regards, Joerg http://www.analogconsultants.com/ Which is hy mose of us carry a small tool repair kit that includes a chain-breaker. That way a broken chain isn't an ememrgency and a repair only takes a few seconds. After all seconds count when you're beig stalked by mountain lions or other hungry critters doesn't it? For someone who either breaks chains a lot or often comes across people with a broken chain (bother very rare where I ride even on the technical trails) it ONLY makes sense to have a chain breaker and spare link(s)and quick-link WITH YOU. To be honest using a rock and rusty nail to repair a chain in the field sounds like something an armchair bicyclist would think up. Such a repaired chain would most likely fail again after only a short distance. Believe it or not there's good reasons why chain breakers are used to fix a chain. Cheers Out of curiosity I weighed and measured the chain tool that I carry in my bike tool kit. It is 2-1/2 inches in length and 2-1/8 inches in height. 1/2 inch thick, at its thickest, and weighs 2.6 ounces. It works with chains up to and including 10 speed chains (I don't own an 11 speed). Frankly, as a broken chain immobilizes the bicycle I can see no logic in not carrying it. Since I have never once had a broken chain nor seen one I cannot see any requirement to carry such a tool. Yesterday I did 55 miles and 2500 feet of climbing with some of it pretty steep ~12%. There were fore of us there and the dirt encrusted on the bikes showed a certain lack of careful maintenance. No one had any problems. I have been carrying all these tools around for the last 6 years and the only one's I've used are the tire repair tools. Equally, I have had two crashes severe enough to break bones and in neither did my head strike the ground. Thus, based on your logic, there is no reason what so ever to wear a helmet. There is almost no reason to wear a helmet under any conditions. If a helmet was just barely able to protect me in a fall literally from 18" what makes you think that a helmet can do anything other than protect you from getting scratches on your head in a sideways fall at a dead stop? My oldest daughter hit her head on a concrete retaining wall hard enough to crack the hardshell bike helmet and came away without a scratch (on her head - she did get a bit of "road rash" elsewhere)- and most certainly would have suffered a concussion without it. The foam lining and hard plastic shell absorbed a LOT of impact. |
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