Looking for images of broken drilled alloy dropbar
I've advised people not to drill an alloy handlebar in order to route their brake cables and/or derailleur cables inside the handlebar. I looked on the web for images of broken alloy dropbars that have failed because of being drilled but can't find any. I KNOW I had such images on my other computer that dies. Can anyone here give me links to such images of broken drilled alloy dropbars?
Cheers |
Looking for images of broken drilled alloy dropbar
On 1/16/2020 4:25 AM, Sir Ridesalot wrote:
I've advised people not to drill an alloy handlebar in order to route their brake cables and/or derailleur cables inside the handlebar. I looked on the web for images of broken alloy dropbars that have failed because of being drilled but can't find any. I KNOW I had such images on my other computer that dies. Can anyone here give me links to such images of broken drilled alloy dropbars? Cheers Broken handlebars are well documented: http://pardo.net/bike/pic/fail-001/000.html But although the principle of a hole in a dynamically stressed tube is clear, I could not find an image. I have seen home-drilled bars propagate cracks but not actually fail. That may be a function of low mileage on specialty bicycles. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
Looking for images of broken drilled alloy dropbar
On 1/16/2020 5:57 AM, AMuzi wrote:
On 1/16/2020 4:25 AM, Sir Ridesalot wrote: I've advised people not to drill an alloy handlebar in order to route their brake cablesÂ* and/or derailleur cables inside the handlebar. I looked on the web for images of broken alloy dropbars that have failed because of being drilled but can't find any. I KNOW I had such images on my other computer that dies. Can anyone here give me links to such images of broken drilled alloy dropbars? Cheers Broken handlebars are well documented: http://pardo.net/bike/pic/fail-001/000.html But although the principle of a hole in a dynamically stressed tube is clear, I could not find an image. I have seen home-drilled bars propagate cracks but not actually fail. That may be a function of low mileage on specialty bicycles. Apparently it's not uncommon to drill holes in motorcycle handlebars, and there's even a tool for that https://www.kiwavmotors.com/en/tools-accessories/controls/kiwav-motorcycle-handlebar-drill-guide-detail. Probably you wouldn't want to do this on an aluminum alloy handlebar though. As you stated, the principle is clear. People do dumb things all the time and get away with it, but it still doesn't make doing these things a good idea. As Jobst Brandt once said, "I don't know many riders who believe that drilling a hole in a frame tube is a reasonable concept." The same applies for drilling holes in handlebars. |
Looking for images of broken drilled alloy dropbar
On Thursday, January 16, 2020 at 2:54:47 PM UTC, sms wrote:
As Jobst Brandt once said, "I don't know many riders who believe that drilling a hole in a frame tube is a reasonable concept." The same applies for drilling holes in handlebars. Jobst came from a different era, when stupidity wasn't rewarded as it is now. Ande Jute Curmudgeon |
Looking for images of broken drilled alloy dropbar
On 1/16/2020 8:54 AM, sms wrote:
On 1/16/2020 5:57 AM, AMuzi wrote: On 1/16/2020 4:25 AM, Sir Ridesalot wrote: I've advised people not to drill an alloy handlebar in order to route their brake cables and/or derailleur cables inside the handlebar. I looked on the web for images of broken alloy dropbars that have failed because of being drilled but can't find any. I KNOW I had such images on my other computer that dies. Can anyone here give me links to such images of broken drilled alloy dropbars? Cheers Broken handlebars are well documented: http://pardo.net/bike/pic/fail-001/000.html But although the principle of a hole in a dynamically stressed tube is clear, I could not find an image. I have seen home-drilled bars propagate cracks but not actually fail. That may be a function of low mileage on specialty bicycles. Apparently it's not uncommon to drill holes in motorcycle handlebars, and there's even a tool for that https://www.kiwavmotors.com/en/tools-accessories/controls/kiwav-motorcycle-handlebar-drill-guide-detail. Probably you wouldn't want to do this on an aluminum alloy handlebar though. As you stated, the principle is clear. People do dumb things all the time and get away with it, but it still doesn't make doing these things a good idea. As Jobst Brandt once said, "I don't know many riders who believe that drilling a hole in a frame tube is a reasonable concept." The same applies for drilling holes in handlebars. Motorcyclists may but ought not. It's both stupid and illegal see typical WI statute 347.486: https://docs.legis.wisconsin.gov/sta...es/347/III/485 -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
Looking for images of broken drilled alloy dropbar
On 1/16/2020 10:31 AM, AMuzi wrote:
On 1/16/2020 8:54 AM, sms wrote: On 1/16/2020 5:57 AM, AMuzi wrote: On 1/16/2020 4:25 AM, Sir Ridesalot wrote: I've advised people not to drill an alloy handlebar in order to route their brake cablesĂ‚Â* and/or derailleur cables inside the handlebar. I looked on the web for images of broken alloy dropbars that have failed because of being drilled but can't find any. I KNOW I had such images on my other computer that dies. Can anyone here give me links to such images of broken drilled alloy dropbars? Cheers Broken handlebars are well documented: http://pardo.net/bike/pic/fail-001/000.html But although the principle of a hole in a dynamically stressed tube is clear, I could not find an image. I have seen home-drilled bars propagate cracks but not actually fail. That may be a function of low mileage on specialty bicycles. Apparently it's not uncommon to drill holes in motorcycle handlebars, and there's even a tool for that https://www.kiwavmotors.com/en/tools-accessories/controls/kiwav-motorcycle-handlebar-drill-guide-detail. Probably you wouldn't want to do this on an aluminum alloy handlebar though. As you stated, the principle is clear. People do dumb things all the time and get away with it, but it still doesn't make doing these things a good idea. As Jobst Brandt once said, "I don't know many riders who believe that drilling a hole in a frame tube is a reasonable concept." The same applies for drilling holes in handlebars. Motorcyclists may but ought not. It's both stupid and illegal see typical WI statute 347.486: https://docs.legis.wisconsin.gov/sta...es/347/III/485 Are you referring to the prohibition against "improvised" handlebars? I'm not sure that would specifically prohibit a hole. I know one guy - a professional bike mechanic - who snapped the handlebar on his 1980s aero bicycle (small front wheel, disc rear, extremely low bars, etc.) He was sprinting away from a stop and the bar snapped at the hole for the "aero" brake cable. But I think the forces on motorcycle handlebars are much lower than those on bicycles. It's not that I recommend drilling MC handlebars; but I think the risk would of fracture would be far lower than for a bicycle. Someone sells a tool for it. https://www.amazon.com/KiWAV-Motorcy.../dp/B00EH2M40G -- - Frank Krygowski |
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