Originally Posted by
Big B
You can use damn near any spur gear out there, they are not Tamiya specific, only if you plan to race in a TCS race do you need tamiya parts. A few guys on here have said the Kawada, I think (NOT SURE) that the Associated, and CRC will work as well
Spur gears are open for TCS, only if you go to the worlds in Japan do you have to have 100% Tamiya parts.
I run the .04 Gears and have never had a durability issue. If you set the mesh right they will last a long time. I beleive that I had one last two outdoor seasons way back when.