The rims are an aluminum alloy. around $125 ea. https://www.visionwheel.com/wheel/896/VisionWheel/521 Nitro?finishID=2404 On another note, I have 2 20R engines that I am not planning on using. 1 was running when pulled the other looks like it broke a valve stem above the guide. If anyone wants to come to pick them up please let me know.