The tracks will probably need to be made from hinges, at least that is what I am going to use. for your tank a 2 inch steel hinge is probably the best bet. If the suspension is anything like a StuG which your tank kind of looks like you will need to get some hydrolic dampeners to absorb the shock and then have a hinged bracket that the road wheels sit on that pivots up and down to move with the terrain.

I am getting the automotive style ones for my tank

http://www.mcmaster.com/#standard-sh...orbers/=i2u6bn<br type="_moz" />