Got out for a 50k in the mountains with my wife. She rides with me quite a bit but it was the first time she had done any climbing. I was quite surprised that once the grade turned up a bit, she flew past me like I was standing still. She struggles to keep up on the flats at fast paces but in the mountains, she is a strong! She was waiting for the group at the top of all the bigger climbs. I guess it helps that she is tall and thin...