Easton carbon post- at the point where it meets the plastic shim it looks like it has melted(!) – underneath this area there is a vertical ‘fissure’ in the material. Its slipped a couple of times (I only found this when I removed to apply Fiber paste). I havent overtightened but could it be?! Thoughts?

https://m.flickr.com/#/photos/30625376@N06/15906630015/

Looks like overtightening to me, it’s been crushed surely? The shim just seems to have caused more damage than there would otherwise have been without one.

Bin the post, but ffs fix that wall issue!

Overtightened. New post time. Use some of that £8 carbon paste when fitting the next one and save yourself a bit ofbmoney.

Mental because I only tightened enough so the saddle couldnt be twisted. Ive got a 9yr old easton carbon post thats delaminated but stayed good thats been dropped/raised and tightened countless times. No damage. This new one even states its strengthened to prevent crush!

Any particular reason you’re using a shim and not a wider seatpost? Going for narrower = more comfy perhaps?

Did you use a torque wrench, or did you just figure ‘that’s good enough’?

He said ‘ till the post didnt spin any more’

Of course it didnt spin any more – its oval 🙂

Did you use a torque wrench, or did you just figure ‘that’s good enough’?

tighten til it cracks or the thread strips, then back off half a turn.

Having got one of those Ritchey torque keys (set at 5nm, suitable for bars, stems etc) I’m surprised how much torque that is, I reckon I’ve always used less than the maximum on bars and stems and considerably less on the seatpost (but then I am a lightweight).