This is the Wheels Addon Pack - Thyphoon Edition for the famous rolling chassis version of Gzumwalt's PLA Spring Motor The same spacing between rim and tire was used as for the Lancia Stratos model (MakerBot Verified Files approved.) I had no problem to put them together and they fit tight without need of additional glue. Please check the Spring Plus remix to give them the right boost. All files are netfabb checked.