VINTAGE MATTEL HOT WHEELS CHOP CYCLE YELLOW SPEED STEED w/ BROWN RIDER These are similar to the RRRumblers series however have a motor so are compatible with the Sizzler track. Came out in a short run around 1972 only. The model is untested and missing the cover of the base. However the bike and rider appear to be in excellent condition. See all images, any questions please feel free to ask.