Rock Crawler




1) For the sake of brevity LDR file uses the same submodel for both axles. You, however, need to put the 20-tooth gear on the other side of the 12-tooth gear on one of the axles!
2) There are several not-so-legal part placement, but it's okay. No excessive stress is incurred.

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Name Rock Crawler
Designer Dalafik
Designed 2015
Inventory 1043 parts
Theme Technic


  • 1 year, 6 months ago nzmike Level 12
    Looks great - I'm saving it to my list of MOCs to build!  It's a shame you couldn't have tested it outside on some proper terrain but it's still looks quite impressive anyway. 

    Any idea what the total weight is (with batteries included)?  I find so many MOCs too heavy and slow to be much fun but yours does look quite light :-)
    • 1 year, 6 months ago Dalafik Level 11 Designed this MOC
      Weight shouldn't be a problem, but I'd recommend using CLAAS tyres instead of the old ones in the video.
      • 1 year, 6 months ago nzmike Level 12
        Thanks for the reply - I have the Class Xerion 5000 set in pieces so I'd definitely be able to use those.
  • 2 years, 6 months ago Delta_1 Level 2

    I want to build this Crawler too, but i cant find the Instruction for the axles? They are in Step 2 of LDR File complete?!?

    • 2 years, 6 months ago Dalafik Level 11 Designed this MOC
      The LDR file consists of multiple sub-models. See the manual for the program you are using for how to switch between them.
  • 3 years, 7 months ago koko9890 Level 6
    I am building that moc atm but with 4 xl motors and a bit different axles but same chasis and body with some additional visual details like exhaust and 5th tire and claas tires
  • 4 years, 3 months ago hbabcock Level 2 PRO
    I've been thinking about getting the LEGO crawler (#9398) for a while, but this one looks cooler so I bought the parts for it instead. Thank you for sharing this!
  • 4 years, 4 months ago Gomez83 Level 6
    Outstanding Moc! Thinking about building it with xl motors and knob wheels though...
    Congrats M8!
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These types of files are created with the LDraw system of software. You will need to install compatible software to open and view the instructions. A full list of available software is on the LDraw site.