Originally Posted by juan162
Originally Posted by caotropheus
Juan
Can't a Setback Thomson seatpost solve your seatpost problems?
Unfortunately, all the layback seatposts are too short.
Juan
Even if you could get a setback seatpost, I don't see how that solution would actually be different from that offered by the Brompton saddle pin adapter. Either way you're going to place your weight in a different place in relationship to the frame, meaning stresses on the frame that it wasn't designed for; and the effect will be more pronounced if (like me) you have your seatpost at or above "minimum insertion." Maybe your seatpost can handle it; maybe not. Maybe your frame can handle it; maybe not. How to tell?
It would be nice if we could look all this up in a database of stresses known to cause failure in different frames... I wonder if ANY manufacturer has that kind of thing.