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Scary sight of seat post flexing

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Scary sight of seat post flexing

Old 09-29-12, 09:45 PM
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deepakvrao
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Scary sight of seat post flexing

Just posted a pic of wifey on the trainer, and noticed that the seatpost shows quite a bit of 'flex'. Is this normal for a carbon seat post, or is it about to explode?

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Old 09-29-12, 10:02 PM
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Well first off, and most important, I believe the correct BF term is "asplode"

And to answer your question: unless there is visible cracking on the outside or possibly inside the seatpost, it should be fine. Carbon is designed to flex, that is what gives it it's compliance.
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Old 09-29-12, 10:28 PM
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Can't even see the seatpost in that pic.

But it's probably fine. Like was said above, carbon is made to flex a bit.
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Old 09-29-12, 10:37 PM
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Great picture
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Old 09-29-12, 10:37 PM
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With the bike clamped down on a trainer flex is exaggerated.
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Old 09-29-12, 10:40 PM
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Perhaps you're just seeing the trainer flex.
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Old 09-29-12, 11:52 PM
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Thanks guys. No visible damage, and 1.5 years after buying that trainer, I finally got onto it. Apparently my saddle also shows some movement on hard efforts.

1 hour on the trainer, and I hated it. How the heck do guys do 4 hour trainer sessions?
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Old 09-30-12, 01:49 AM
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I've never done a four hour session on a bike, ever, but I find the trainer plenty relaxing with a workout set up via TrainerRoad and Netflix playing. It's like being a couch potato, only not, and like a bike ride, only without the vaguest worry about having to deal with a mechanical on the road. However, I'm a former gym rat, so that may feel more normal to me.
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Old 09-30-12, 05:55 AM
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If you are down for One hour interval Sessions: Sufferfest videos

Those were literally my introduction to road cycling when I took it up. The year was so snowy out at school that riding was not going to be possible so I bought a few of these and by the time Spring rolled around I was dropping the rest of the collegiate cycling team.

Also as Devin Said: Great picture
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Old 09-30-12, 07:21 AM
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^^^That's a Sufferfest video on the screen there :-)
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Old 09-30-12, 08:07 AM
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Originally Posted by deepakvrao View Post
Th
We don't
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Old 09-30-12, 08:08 AM
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Originally Posted by deepakvrao View Post
Thanks guys. No visible damage, and 1.5 years after buying that trainer, I finally got onto it. Apparently my saddle also shows some movement on hard efforts.

1 hour on the trainer, and I hated it. How the heck do guys do 4 hour trainer sessions?
We don't- we ride outside in sun, rain, heat, snow. Trainers absolutely suck. If you must have one the absolute best is the Kirk Kinetic Rock and Roll. Gives a moving far more realistic ride than the fixed trainers.
https://www.kurtkinetic.com/rock-roll-p-112-l-en.html
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Old 09-30-12, 10:34 AM
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deepak, I tend to only go about an hour as well, usually watching a tv show series or whatever.
Oh, and as I'm sure you've noticed, the dripping sweat thing is always worse, hope you've reduced the rusting issue btw.
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Old 09-30-12, 10:48 AM
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Originally Posted by surgeonstone View Post
We don't- we ride outside in sun, rain, heat, snow. Trainers absolutely suck. If you must have one the absolute best is the Kirk Kinetic Rock and Roll. Gives a moving far more realistic ride than the fixed trainers.
https://www.kurtkinetic.com/rock-roll-p-112-l-en.html
Read your posts on that before I ordered, but could not get anyone willing to ship to India with charging me enough for me to have to sell a kidney. By any chance, are you a urologist/gal bladder surgeon?
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Old 09-30-12, 10:49 AM
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Originally Posted by djb View Post
deepak, I tend to only go about an hour as well, usually watching a tv show series or whatever.
Oh, and as I'm sure you've noticed, the dripping sweat thing is always worse, hope you've reduced the rusting issue btw.
^^Towel on the TT. Wiped and sprayed the crank/BB after the session. Puddles of sweat on either side of the bike though.

Should have posted a video of the post flexing. Will do it next time I set up the bike.
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Old 09-30-12, 02:37 PM
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Get rollers and the associated gear to increase the workout. You have the benefit of riding the bike actively rather than sitting on it as you do with a trainer.
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Old 09-30-12, 03:30 PM
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Originally Posted by Rowan View Post
Get rollers and the associated gear to increase the workout. You have the benefit of riding the bike actively rather than sitting on it as you do with a trainer.
Agreed. Rollers force you to focus on your riding somewhat.
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