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An anomaly or "does my a$$ look big on this saddle"?
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 2009-08-06 12:01 PM |
Expert  838    West Palm Beach, FL |  Subject: An anomaly or "does my a$$ look big on this saddle"?Back in May I snapped the seat bolt on my saddle about 15 miles from home http://www.beginnertriathlete.com/discussion/forums/thread-view.asp... I chalked it up to metal fatigue, replaced the bolt and moved on with my life. So last Sunday, 42 miles in to a 50 miler I lean back a bit on my saddle and the same thing happens again! The bolt shears in the middle, the seat goes flying and the naked seat post trashes a pair of Canari bib shorts not to mention gouges a nice 4" slash in the back of my left thigh. So freaking lucky to avoid stitches. At least this time I only have 8 miles to hobble home. So WTF? Not one other roadie I've talked to has ever experienced this (OK, I only interviewed 3, not a huge sample). I'm 6'1, 215 so I'm Clyde but certainly not the biggest guy on a bike. I've narrowed the causes for this unusual chronic failure down to 3 possibilities: 1) The current state of metallurgy and mechanical engineering is in shambles. Metal fatigue (and I'm not talking about listening to Motley Crue for 3 straight days) is at a historic high. 2) I put out so many blistering watts on the bike that seat post bolts can not stop me, they can only hope to contain me. 3) I have a big, fat a$$. I'm going with a combination of 1 & 2. |
| 2009-08-06 12:03 PM in reply to: #2331951 |
Master 1572 PA | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? I like big butts and I cannot lie. |
| 2009-08-06 12:10 PM in reply to: #2331951 |
Extreme Veteran 575 Concord, NH | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Are you tightening the bolt to much? What are the torque recommendations? That is another possible reason. |
| 2009-08-06 12:10 PM in reply to: #2331951 |
Master 1529 Living in the past | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Spleen - 2009-08-06 12:01 PM Back in May I snapped the seat bolt on my saddle about 15 miles from home http://www.beginnertriathlete.com/discussion/forums/thread-view.asp... I chalked it up to metal fatigue, replaced the bolt and moved on with my life. So last Sunday, 42 miles in to a 50 miler I lean back a bit on my saddle and the same thing happens again! The bolt shears in the middle, the seat goes flying and the naked seat post trashes a pair of Canari bib shorts not to mention gouges a nice 4" slash in the back of my left thigh. So freaking lucky to avoid stitches. At least this time I only have 8 miles to hobble home. So WTF? Not one other roadie I've talked to has ever experienced this (OK, I only interviewed 3, not a huge sample). I'm 6'1, 215 so I'm Clyde but certainly not the biggest guy on a bike. I've narrowed the causes for this unusual chronic failure down to 3 possibilities: 1) The current state of metallurgy and mechanical engineering is in shambles. Metal fatigue (and I'm not talking about listening to Motley Crue for 3 straight days) is at a historic high. 2) I put out so many blistering watts on the bike that seat post bolts can not stop me, they can only hope to contain me. 3) I have a big, fat a$$. I'm going with a combination of 1 & 2. Before you throw down on the engineering profession, let's get a look at the bolt...post a close-up pic of the failure surface (s), if possible |
| 2009-08-06 12:16 PM in reply to: #2331956 |
Pro 4054 yep, | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? |
| 2009-08-06 12:39 PM in reply to: #2331956 |
Champion 10157 Alabama | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? gopennstate - 2009-08-06 12:03 PM I like big butts and I cannot lie.
I just spayed my monitor with hot coffee!
~Mike |
| 2009-08-06 1:14 PM in reply to: #2331956 |
| Extreme Veteran 844 | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? gopennstate - 2009-08-06 12:03 PM I like big butts and I cannot lie. Thank you.. that song is now stuck in my head... |
| 2009-08-06 1:28 PM in reply to: #2332180 |
Champion 10157 Alabama | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? dbrawders - 2009-08-06 1:14 PM gopennstate - 2009-08-06 12:03 PM I like big butts and I cannot lie. Thank you.. that song is now stuck in my head...
Oh, it that a song?! I just thought Jenn liked big butts! Dang....
~Mike |
| 2009-08-06 1:36 PM in reply to: #2331951 |
Expert 1456 Central New Jersey | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? My teeny tiny petite friend has snapped 2 seatposts in the last few months. She can't weight 100 lbs soaking wet. Turns out she was overtigtening the bolts on the carbon seatpost. Stress=break |
| 2009-08-06 1:51 PM in reply to: #2331951 |
Expert 1139 Austin | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Send me the failed bolt and I'll take it to the lab to check out #1 for ya. My guess is #2. (or overtightening of the bolt, but that's not as cool of an answer) |
| 2009-08-06 2:21 PM in reply to: #2331951 |
Master 1572 PA | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? I think tasr just did this as well in June. You could PM him for specifics. I got it stuck in my own head too!  |
| 2009-08-06 2:21 PM in reply to: #2332223 |
Bob 2194 Binghamton, NY | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Rogillio - 2009-08-06 2:28 PM dbrawders - 2009-08-06 1:14 PM gopennstate - 2009-08-06 12:03 PM I like big butts and I cannot lie. Thank you.. that song is now stuck in my head...
Oh, it that a song?! I just thought Jenn liked big butts! Dang....
~Mike
I like big butts and I can not lie |
I had to do it!!| 2009-08-06 2:25 PM in reply to: #2331951 |
Champion 10157 Alabama | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? I guess I'm getting old Bob....never heard that song. I do remember: "...ain't gonna bump no more, no big fat woman....she done broke my hip, she done knocked me down...."
~Mike |
| 2009-08-06 2:30 PM in reply to: #2331951 |
Expert 1456 Central New Jersey | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? |
| 2009-08-06 2:34 PM in reply to: #2331951 |
Master 1440 | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Strongly suggest a class 6 stainless steel bolt (gonna cost at least 2x as much as regular carbon steel, but worth it) and don't over tighten. Also check to seeif the metal you are gong through is a dis-similar metal. You might be getting some sort of weird Galvanic action going on causing it to weaken (This is highly unlikely, but hey might as well check it all) |
| 2009-08-06 3:00 PM in reply to: #2331951 |
Expert 1074 Madison, MS | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? It's the Boogie in Your Butt! |
| 2009-08-06 3:01 PM in reply to: #2332061 |
Expert 1074 Madison, MS | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Rogillio - 2009-08-06 12:39 PM gopennstate - 2009-08-06 12:03 PM I like big butts and I cannot lie.
I just spayed my monitor with hot coffee!
~Mike Bwahahaha!!!! You "spayed" your mother???? I bet she would have preferred an anesthetic to the hot coffee... |
| 2009-08-06 3:04 PM in reply to: #2332417 |
Master 1572 PA | Subject: RE: An anomaly or "does my a$$ look big on this saddle"? Rogillio - 2009-08-06 3:25 PM I guess I'm getting old Bob....never heard that song. ~Mike youtube is your friend, mike! |
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