So I have been reading through these forums, googling, etc, but still not 100% sure how to get this right. How do I get the definitive answer?

Details below.

My weight (fully dressed plus a backpack with some snacks and personal items) approx.: 85-90Kg / 187-198 Lb
Bike weight approx.: 13Kg / 29 Lb
Bike type: Hybrid
Tyres: 700x40c