How do you reduce friction for a balloon powered car?

Answer 1

Graphite powder is an awesome lubricant, use it in the axles tubes,(depending how the car is made), if it doesn't have axle tubes, adding them would greatly reduce frictions, basically glue in a straw that is slightly bigger than your axles then put the powdered graphite and its like a slick bearing now, just don't use anything wet, stick with dry lube..

Answer 2

To reduce friction for a balloon-powered car, you can use wheels with low friction bearings, ensure the wheels are properly aligned for smooth movement, use a smooth and flat surface for the car to run on, and use materials with reduced friction properties for the axle and wheel contact points.