Extreme is an understatement. The 6900 XD is capable of loads up to 50 tons and, in tractor form, capable of GCWs up to 200 tons.

Specifications
BBC	141"
Axle Position	59"
Engine	3 manufacturers, 210-600 HP
Transmissions	Full range of manual, automated, and automatics
Front Axle Range	Up to 28,000 lbs.
Rear Axle Range	Up to 110,000 lbs.
Special Options	Planetary front and rear axles