The Trek Fuel EX 9.9 29 has been reviewed by several outlets after a first ride. Some reports suggest it may be one of the best trail bikes available, although the model year being reviewed is unclear, with some outlets referencing the 2017 model and others mentioning later years, including 2020, 2023, and a "secret menu option" for 2026. The bike is described as adaptable and having notable features, with one outlet calling it a "triple-threat" of sorts.