Pinewood Derby Wheel Flaws
2015-2016 season- It usually takes about 4 sets of wheels to be able to hand pick the flaws. Pay particular attention to molds 4,6,10,16. Most wheels can be fixed if you have the right machines and tooling. If you don't have any, and you have a very competitive pack, then you might have to spring the extra $8 for more sets of wheels to pick the best ones.