Originally Posted by
prostuff
I was thinking of attatching a rack to the seat and putting a backpack on it that won't wheigh more than 6 kg fully loaded.
A backpack can be pure misery after a short while.
Total load will define your requirements, there is indeed a good reason why touring rigs have the fittings for racks & doo-dads.
That being said, "back when" the bikes for serious club riders were light and responsive but would take mudguards and a rack for weekend touring or Brevets. Seems like much of today's production would require a follow car for trips that were self supported not long ago.
Here's a pic of a modern club rider's design fitted for a bit of carrying capacity and a classic randonneur as well.
Adding a handlebar bag & a rear rack takes minutes on/off but not a CF wunder-bike.
-Bandera