I've just packed my panniers as we leave for the big tour on Friday night. However, my panniers weigh a TON!! Approx 13kg. I honestly think I've been careful...no sparkly heels, no earrings, I've even left behind the fake tan. I've been quite ruthless but they seem SO heavy. Is this too much? I'm worried I won't even be able to get Liesl rolling, let alone up a hill.