I bought a lot of various parts, but I can't seem to identify the following parts.

  • The grey wheels have rubber on one side of the axl hole
  • I'm thinking that that the black frame-thing isn't Lego, but wanted to be sure before tossing it.
  • The white wheels have circular holes, not axl holes.



2 Answers 2


The 6 black parts on the left might me (used): Tire 14mm D. x 9mm Smooth Small Wide Slick

  • I can't identify the black parts.

  • The toothed wheel is a string reel spool.

  • The rest of the parts appear to have come from a Robotics Invention System set from RCX-era Mindstorms:

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