Unfortunately, adding more bags without throwing out something else is not going to work. As I said: the baggage allowance on most long haul flights (excepting those to and from the US) is ~20kg. Bike, bike box and panniers alone are more than that already. The additional "stuff" I take on the plane (camping & cooking equipment, clothes, laptop, hiking gear etc.) is another 15-20kg.

I envy you guys who can happily travel with just 10kg of stuff