Such super-fast models traditionally require detailed assembly and separate powertrains and electronics. The Traxxas XO-1 is complete out of the box, including a Traxxas/Castle brushless-electric motor called the Big Block. It generates 3.5 horsepower and can spin to 40,000 rpm. At only 13.2 pounds, the XO-1 carries just 3.8 pounds per pony versus 4.5 for the 1001-hp Bugatti.
To ward off range anxiety, our test example sported a pair of upgraded 0.09-kWh lithium-polymer batteries ($160 each, plus $10 for the mounting kit) in place of the standard 0.06-kWh packs. Replenishing the batteries takes two hours with a fast charger ($130); despite the upgrade, we managed only 20 minutes or so between recharges.
Both gearing and an electronic governor initially limit the Traxxas XO-1 to 50 mph. a larger pinion gear for the motor is included to enable higher speeds. you can disable the electronic limiter through a Traxxas link app running on an iPhone or an iPod touch, which docks with the included pistol-grip controller and displays real-time telemetry.