These gears can be used with the Turbine. They have a keying feature that allows them to be changed quickly and easily. One gear fits the 2mm motor shaft.

This set of gears is designed for use on model projects. The small 8 tooth gear will fit on most 2mm motor shafts that are found on lots of DC motors. Gears have a keying feature that allows them to be changed quickly and easily from the key. Once the key is secured to the driveshaft the gears can be removed quickly without glue or tape etc. The key will press fit on 7/64" diameter. It can also be drilled out to fit larger shafts. (works together with B-12 hole hub) Largest Gear is 10.5 cm. 2nd Largest Gear is 5.5 cm. 3rd Largest gear is 3 cm.