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Monster Trucks

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Steering the humungous tires is handled by a fully hydraulic system and is facilitated by using two single ended hydraulic rams. The typical Monster Truck axle is a ZF unit found under heavy equipment. The ZF axles us a planetary gear set at each wheel with a gear reduction that is typically about 6.3:1 and use a ring and pinion of 2.6:1, giving them a total reduction of 16.5:1. This can vary from truck to truck, but the principle is the same in that the large amount of gear reduction reduces stress on the rest of the drivetrain.