wheel gear for RC speed tank

This gear wheel is for RC speed tank : https://www.thingiverse.com/thing:2024364. For temporarily use.
Motor Shaft Diameter: 3.175mm

My printer is i3, with low precision, so "gear2.STL" works for me. I don't know how about yours. I printed it extremely slow. and 100% fill. 0.12 per layer.