The TUG ALPHA 4 is the first and newest tractor in the TUG ALPHA family of pushbacks. This innovative pushback is designed with safety in mind and is capable of pushback and towing requirements for aircraft weighing up to 850,000 pounds. All components of the TUG ALPHA tractors are selected to make high performance, ergonomic and reliable tractors that will have a very long and stable service life in an extremely demanding environment.