Resurrecting this ancient thread not because I think OP still needs their question answered, but because this page appears prominently on Google when searching for answers around the max weight a 787 can take.

I just completed a 4 day bikepacking trip in heavy mud and challenging conditions. I was nervous about putting my 787 through it, but when it transpired I had to lend my gf my modern mountain bike for the trip I had no other choice.

I weigh 75kg, and my cargo for the trip (water, camping gear, clothes) weighed 25kg, making the combined load 100kg - or 220lbs in old money. The Vitus did admirably, didn't scare me at any point with flex. In fact it actually survived a very nasty crash while loaded up (crash was in no way the bike's fault) without any kind of structural damage - although to be fair it had a soft landing, in that it fell on me after I was thrown off it!

Not suggesting every existing 787 frame is as robust as my 56cm one, but thought this was useful information for anyone else googling around the subject.

Worth noting I have unusual components on my 787 - 650b wheels, Tektro long drop brakes, quill stem adapter and 46cm Ritchey Venturemax bars.

Pic for loadout