Cane Creek has the ST and LT Thudbuster seat posts that have been reviewed many times here on EBR.
The LT travels quite a bit and even the ST model has 50mm of travel - great for trail and rough riding I'm sure. For my road riding I wanted something for the long rides and when the pavement gets rough, but not too much travel as I enjoy the 'fit' my road ebikes have now....
I have ordered recently the Cane Creek Thudbuster eeSilk to give a try:
These compliance seatposts make great enhancements to endurance road bikes by reducing the chatter transmitted from the surface to the rider. Shop now!
canecreek.com
20mm of travel, just enough to take the edge off the road riding I do, is what I hope for without impacting the fit and positioning of the seat too much. Ordered from Cane Creek so I could be sure to get the #9 elastomer rated for the 250lb+ riders (comes with a 3, 5 and 7 elastomer for lower weight ranges) which I'm still in for another 23lbs. ;-)
Bigal1463 - The #3 elastomer included in the package is rated for 100-160lbs for your notes.
Important note - not cheap - $290 USD for the post and first 3 elastomer's and $13 for an extra elastomer if needed, plus shipping. With my goal to ride 5,000kms+ every year I figure this is a good investment in my riding comfort.
I will report back in a few weeks when I have received it and had a chance to ride it a few times.
Cheers
Shaun