In reply to kp1:
Good luck getting hold of a Triban from Decathlon online just now. I've been trying to buy a bike from them for a month , but every day they tell me their delivery slots are full. Their advice was try at 11pm when orders reset for the next day, but that was three weeks ago and no joy yet. I've watched the bikes I've been after go out of stock in my size.
I was ideally after a Van Rysel EDR AF, but would have bought a Triban 520. (the Van Rysel is lighter, with rim brakes).
You might have more luck if your store is nearer?