Bike model years can be confusing at best. Brands update in the middle of the year and it can be unclear. Our product listings use the most up-to-date information as we possibly can to match the manufacturer's website and general convention if you were to search the web. For the Trek Fuel Ex…. 2020 - 2022 is the Fuel EX Gen5. Available in Alloy and Carbon, this version had a bumper at the top of the downtube to protect the frame when the fork spun around. 2023 is the Gen6 version of the Fuel EX. This is the first year that the Fuel EX is a 150mm Fork and 140mm rear travel.