Vine made his Grand Tour debut in the 2021 Vuelta a España,[8] ultimately placing 73rd. He also featured in several breakaways, the most notable of which were on stages 12 and 14. On stage 12, he was the last remaining rider of a late breakaway attempt and was caught inside the final kilometre.[9] Two stages later, with 35 kilometres (22 mi) left, Vine dropped back to his team car, and as he was collecting something, he drifted into the side of the car and crashed. He suffered moderate road rash but was able to recover and place third on the summit finish to Pico Villuercas.[10][11] As a result of his performances during the Vuelta, Alpecin–Fenix extended his contract by two years.[12]
In August 2022, Vine rode his second Grand Tour at the Vuelta. On stage six, which finished atop the climb of Pico Jano, Vine attacked from the GC group at around 10 kilometres (6 mi) from the finish. After catching and passing Mark Padun, the remaining lone breakaway rider, Vine held off the GC contenders to win the stage, taking his first win as a professional. He finished 15 and 16 seconds ahead of Remco Evenepoel and Enric Mas, respectively.[16] Two days later, on the race's second mountaintop finish, Vine got into the break that contested the stage win. On the final climb of Collau Fancuaya, Vine dropped his breakaway companions to take his second stage win of the race, taking the lead in the mountains classification in the process.[17] He crashed out of the race on stage 18 while wearing the polka dot jersey.[18]
Vine and his wife Bre, fellow cyclist/full time manager support,[8] live in Andorra.[21][22] On August 14, 2024, just before his start at the 2024 Vuelta a España, they welcomed their first son.[23][24]