if taigen makes them we would have it but only heng long is the maker of this tank so gears are only made in steel you may need to make a base up to fit taigen gears in to it
dave
Yan33, for the T-90 you need a mid/low set of gearboxes to be able to fit them under the rear deck. The shaft length is 59mm (sometimes stated as 58mm on some gearboxes). Being that the T-90 hull is so wide, getting 390 motors in there are no issue at all either. I think the ones that Dave posted with the 76:1 gear ratio would be too slow for the T-90 anyway. Are you just looking to replace nylon or the pot metal gearboxes you have?
Dave,
steel gears are not just steel gears...
There is a big difference in whether these are made of cast iron, sintered steel or machined steel.
The machined steel one the strongest.