Reports indicate that the fastest shoes at the 2025 Ironman World Championship in Kona have been identified, with ASICS being the top choice of some of the fastest pro runners. However, it is unclear if the same shoes were the fastest at other events, as some outlets are analyzing shoes from different championships, such as the Western States 100 and the Chicago Marathon. The fastest shoes at the 2025 Ironman World Championship in Kona may have been worn by top athletes, including a newly-crowned IRONMAN World Champion.