The Trek Top Fuel 9.8 GX 2021 blends cross-country speed with trail-bike capability, making it a sharp choice for riders who want efficiency without feeling overbiked on technical terrain. Built around a light and stiff carbon frame, it runs 120mm of front and 115mm of rear travel, powered by a RockShox SID Select+ suspension setup and a SRAM GX Eagle 12-speed drivetrain. Fast-rolling 29″ wheels, modern geometry, and a dropper post add stability and control, making the Top Fuel a strong all-rounder for big mileage days, marathon races, or playful trail sessions.