Pine Derby Wheels - The PRO<b> friction-free</b> Official <b> Speed </b>Wheels are Official Wheels from the Official kit that have been lathed to give you a smooth, perfectly trued and balanced wheel. The treads and hubs are then graphite coated using our exclusive patent-pending process. <br><ul><li>Lathed treads, hubs, rims and inside tread are trued and precision tubed</li><li>Coned and squared hubs- reduces fricition on car body</li><li>Graphite coated treads "friction-free"</li><li>Graphite coated hubs "friction-free"</li><li>Official wheels<br></li></ul>Sold in sets of 4.<br><br><br>Designed and Engineered for speed by the Pro's at Pinewood Pro. <br /> <br /> This product has been tested and passed appropriate CPSIA standards by an independent lab and has received a Children's Product Certificate (CPC). <br /><br /> <b>BUY AMERICAN!</b> Pinewood Pro is a US company that has supported the derby car racing community for over 20 years. <br />