*The track drive machines can now be fitted with special polyurethane street pads. These pads are designed to be used on improved conditions while still allowing the traction provided with tracks. The track design provides the regular ground contact while being less damaging to the surface. The pads provide a smooth contact surface rather than the grouser layout which can be damaging to improved surfaces such as pavement. The pads specifically designed for operating on pavement and similar surfaces.
In most situations, the 23.1L x 26 rubber tires are the standard configuration for machines models 14-20. For additional traction, the machines can be fitted with 28L x 26 tires. The larger machines can even be fitted with 67 x 34.00 or 66 x 43.00. To minimize machine width, the smaller 10 and 12 foot machines normally employ 13.6L x 28 drive wheels and single rear wheel assemblies with solid filled 9.5L x 15 tires.
The SCARAB rubber tire models are available in a transverse, or backwards, configuration with the drive wheels located at the rear of the machine. This design is strongly suggested for a machine that will be operated indoors, around obstructions, or in otherwise tight quarters.
For sites with continuous poor conditions, SCARAB offers two Full Track configurations. The patented track assemblies are designed with a heavy duty housing that accommodates either the Caterpillar D4 or D5 track components. 
The patented SCARAB full track assemblies are specifically designed for the SCARAB composting machines. Each track assembly contains its own "suspension system" which is designed in such a way as to allow flotation when traveling over uneven terrain. There is a link between the sides which allows for the assemblies to adjust to the terrain. This allows the assemblies to absorb the uneven terrain rather than transferring it to the main machine frame, thus, greatly reducing the structural stress placed on the frame which can lead to the frame cracking and breaking. Without this flotation ability, structural stress would be applied to the frame leading to reduced life of the machine.
SCARAB
also offers a four wheel drive configuration if the situation warrants. The four wheel drive configuration is uniquely designed to operate in very poor conditions. While the four wheel drive design can be fitted to any machine, it is primarily recommended with the legal load design. For a machine that is going to be operating in one location in poor conditions, it is recommended to go with the full track design.See also the Legal Load Machines
Specifically designed for the legal load configuration, the four track drive provides the ultimate in traction for poor operating conditions. With the ability for the tracks to independently adjust to the terrain as well as the complete track assembly adjusting, the 4TD is able to provide the maximum traction even on very uneven terrain. While designed for the legal load machines, the four track can be adapted to the standard machine; however, if the machine is to remain at one location the full track design is just as efficient.See also the Legal Load Machines
