I covered this in an earlier thread of mine. Dahon advertised Deltech bikes as increasing the capacity from 231 to 300 lbs AND doubling frame warranty from 5 to 10 years. A month after ordering one of their Deltech bikes I saw online they had downgraded this to "increased to 231 lbs", i.e., ZERO increase, and gone is warranty increase as well, both of which mattered to me greatly and upon which I based my purchase. Bike came with zero warranty paperwork or manual. The cable actually does increase frame strength, by a lot. My only guess is that the small welded attachment tabs to the frame are not as strong in fatigue, especially in aluminum, and this suspicion seemed confirmed by recent Deltech bike for Japan market I think, showing the "add-on" Deltech, attached forward by a ring around the steer tube just above the crown (which I wondered if affected steering) and attached rear by a ring around the bottom bracket shell.

So yeah, Dahon appears to make an important product specification claim in writing and then after sales lowers that specification at their own fiat without any recompense to the purchaser. They did that for weight capacity, and frame hinge specification, claiming "New Jaws Hinge" which was the second verson of Jaws, improved, and advertised as improved by Dahon's own video showing the two hinges side-by-side and touting the improvement numbers. I bought based on spec of New Jaws Hinge. Said right in the bike order description, "New Jaws Hinge", the bike ships and arrives with the old Jaws hinge and production date of 2-1/2 years prior to shipment. They don't even have any bikes with the new hinge, but they advertised their stock as having the newest features.

I pointed this all out to Dahon in writing, they blew me off, said the advertising and specs match the bike shipped to me.

I took decisive action, and I won. I'm not ready to discuss details.