2023 Trek Fuel EX | Blister

The Frame

The sixth-generation Fuel EX includes loads of updates, starting with the wild amount of adjustability on offer. The prior-generation bike had a flip chip to toggle between two geometry settings, which the new bike retains, but it adds an optional offset headset that changes the headtube angle by +/- 1.0°, as well as a second flip chip that varies the amount of progression from the rear suspension — more on all that in a minute.

The overall aesthetic design of the frame has also been overhauled to match the new Fuel EXe lightweight e-bike, but Trek’s longstanding ABP suspension design carries over (now producing 140 mm of rear wheel travel, up by 10 mm from the outgoing bike), as does the option for aluminum and carbon frame construction. No matter which frame material you opt for, you get a storage compartment in the downtube, internal cable routing across the board, ample rubber guards on the seatstay, chainstay, and downtube, and a threaded bottom bracket shell. ISCG-05 tabs are also featured, and tire clearance is stated at 2.5’’. Trek’s sometimes-irritating Knock Block headset is nowhere to be found on the new Fuel EX. All sizes can fit a water bottle inside the front triangle, though the size of the bottle is limited on the smaller frame sizes.