Dido what Ausf said. I have a Tamiya Tiger I got it in 2008 I have used the plastic tracks and Kenny Kong's solid horn metal tracks. Both run fine but in general I like the plastic tracks better as the keep they weight down and run well.

I still have the original plastic tracks. I have run them more then the metal and that is what is on it now. If you get metal tracks get the solid horn type. The hollow horns on the Tiger I late tracks have a tendency to break off. Had a friend with the same tank. He got the late tracks with the open horns and he kept breaking horns if he went into a fast neutral turn.

For me the only the the metal tracks have over the plastic is the closed pin. The plastic have the center connections open. It is reliable.

I still have the original gearboxes in it. The ones with the metal/nylon gears. If you run it like a tank and keep the gears clean and lubed they last a long time. If you run it like a race care they will fail. Have the Tiger II had to replace the original gearboxes with the metal/nylon gears. It runs fast out of the box. Lesson learned!!!