sorry, my error,,[] no Matro, I am refering to Asiatam panzer 3 upgrade grade(they had 2 ball bearings on each idler wheel); where as MAtro HAS NOT-a bit like your system.

With my two panzer3/stug tanks. Basically, I use the same principle of asiantam applied to tamiya tiger tank idler wheels.


In my experiece, longer you run your tank with out bearing, the holes on the idler wheel will get bigger.....and it will start track throwing......