Robinson gears. In my opinion. Are the best gears on the market. I ordered Spur & pinions for 2 of my 4 Savage’s. There tuff & durability is second too nun. !!!!!! That’s my opinion. And I get mine sent all the way to Sydney Australia 🇦🇺. As I could not find any hobby stores in Australia 🇦🇺 that’s stocked them.