Top Fuel 9 Gen 4 is an alloy trail bike that’s ready to billy-goat up long climbs and rip back to the bottom for another lap. It gives you the rugged benefits of a lightweight aluminum frame, plus the upgrades you crave, like fully wireless shifting from SRAM’s GX Eagle AXS transmission, 4-piston hydraulic brakes, and a 120mm/130mm FOX suspension package.