Since local Derby rules vary according to location, it's a good idea to check the specific rules you'll be governed by. Generally speaking, the lighter weight the wheels, the better. For open competitions, where the same rules don't apply, even lighter weight Pinewood Derby wheels such as the 0.8g Pro Razor Xtreme wheels can be installed. If you're looking for fast Pinewood Derby wheels, look no further. We've got the best!