The most difficult moment came towards the end of the journey in Canada, when a car cut across their path and caused Kyle to crash.
By that point, they had already ridden more than 15,000 miles. Despite being in considerable pain, Kyle was determined to continue. It was only after returning home that they discovered he had been riding the final two weeks with a broken collarbone.
Those last kilometres were far from easy, but even then, the couple managed to find reasons to laugh. Kyle remembers one particular stretch of roadworks where the tarmac suddenly turned into rough, washboard-like gravel.
"Amy shouted back, 'Ah, this bit's not too bad!' Meanwhile, all she could hear behind her was me going, 'Ow, ow, ow, ow!' At first I was annoyed that she found it funny, but the more she laughed, the more I couldn't help smiling and laughing too."
It was one of those little moments that perfectly captured their experience: even on the hardest days, there was always room for a sense of humour.
Getting up before sunrise, day after day, was never easy. Some mornings meant heading out into torrential rain and strong headwinds; others brought extreme heat and humidity. And there was always another long day in the saddle ahead.
But despite the physical and mental fatigue, Amy and Kyle never seriously doubted they could finish.
"It was tough getting up at 4 or 5am when we were already so tired, knowing we had a whole day on the bike ahead. But we never had a moment where we didn't think we could do it."
Once they started pedalling, things usually felt better.
"Even when it was hard, we always managed to lift our moods and focus on what we had set out to do. We reminded ourselves what a privilege it was to be able to ride every day, and we tried to enjoy it as much as we could."
That mindset carried them through the difficult days, the unpredictable weather, the mechanical problems and the countless kilometres separating them from home.