I used to find, even when I was younger, and also on a 4130 bike at the time, that about 15 kg was the upper limit, as it weight above that cut into my speed and stamina drastically. As well as the ability of my tires to hold up or wheels to not break spokes at times. Luckily, tents and cooking gear are much lighter. I still have luggage and diet scales to weigh things out by the gram. You'd be surprised at what sort of weight you can save across a touring load. Good judgement and cold calculation will net you a lighter load. It is worth the time, and significant trouble it takes, to set up a spreadsheet of your camping gear, and its' weight, so that for this, and any future tours, you can have that information right at your fingertips.