blue-rollers´n´plates
green-pin
yellow-contact surface
orange-initial force
red-resulting force
the red forces in the drawing are compensated in a big part by the fact the chain has no end when joined together,but minimal bending forces will stay present,i think especially with the peak forces trials provokes.
if you make the transfer surface smaller,changing the leverage between the initial lever(roller contact point on pin) and the resulting one(the plates wich dont change size),creating a different force transmission, the remaining parts will be put under the force that isnt relieved in the first part,making the whole system weaker.
hope it makes sense