Originally Posted by
dynaryder
So is the issue the insert? As in,the insert wears,the seatpost rocks back-and-forth,and then the frame cracks? Do the inserts not get replaced at intervals?
the shim is made of aluminium, it is sacrificial and soft to “buffer” the clamping compression and grip.
they are about 4” long and won t do much to prevent frame cracking.
other than a longer collar covering the frame exposed tube, i cannot see much solution other than obviously put the notch at the back with a smaller round hole (rather than large oval) an possibly thicken the tube or add reinforcement bracket as they did on the old jetstream