Why do you insist on defending the deadbolts to the death? You obvioulsy have them, so, ofcourse, your answers are bias. The deadbolts have had essentially one season to prove themselves, which, in my books in not nearly enough time.
It seems that they are strong, but by no means are lighter then the fks, nor surpass them in durrability:
FKS 120 -2.32 lbs
They are even heavier than the Axial 120/Look Px12!
Deadbolt -2.65 lbs
The deadbolts are primarily plastic, while the FKS are mostly metal(heels on all are, toe is plastic on the 120). I will, however, give you credit on the brake system. The FKS brake is a pain to remove/bend, due to the fact it is built into the binding.
I have only heard of FKS ripping out, never a pair being broken, and, people are still riding the old TT9, and ZR's, from 10-15 years ago! Somehow, I dont think that a deadbold, even the 816, could hold up that long.
You can refute everything I say, but the facts stand. Your incorrect about the weight, but, the durrability is hard to determine, because the deadbolts have not been in circulation for long.
In short, this is my signature.