NinjaFlex Tire, tread, traction

This is a file to add some tread to the Helicopter wheels, I have printed them in Grass green NinjaFlex this takes a bit longer as each band is about 30 minutes to print. I used a small piece of a BIC ball point pen to guide the flexible filament into my extruder. About 9mm long piece of the plastic where there is no ink. On the Printrbot Simple metal. The settings I used are below and I hope they help. The extra grip helps it turn the gears and removes the need of rubber bands.