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Set 42200 Monster Jam ThunderROARus Pull-Back
Technic

Monster Jam ThunderROARus Pull-Back

ThunderROARus is one of the dinosaur-themed trucks from the Monster Jam circuit, rebuilt here as a pull-back Technic model. Instead of a motor or remote control, a spring-loaded pull-back mechanism sends the finished truck rolling forward on its own. At 232 pieces, it sits at the more accessible end of the Technic range.

Set number
42200
Year
2025
Pieces
232
Minifigures
0
Theme
Technic
Different parts
63
What can I build with it?

View the official building instructions at LEGO® ↗

Parts list 63

As BrickLink list (XML)

Import on BrickLink: Wanted → Upload, upload the file (or paste its content), pick a Wanted List and add the parts.

Spare parts (9)

These extra parts come with the set in case one gets lost.

Description

How the pull-back works

Pulling the truck backwards winds an internal spring, and releasing it sends the model shooting forward — a mechanical function that gives Technic sets in this size class real play value without relying on batteries or a motor. Getting that mechanism right within 232 pieces means the build stays focused on function as much as looks, so the truck is meant to be raced across a floor, not just displayed on a shelf. That balance of build and play sets it apart from purely static display models, giving builders a reason to keep testing the mechanism after the last brick clicks into place.

Monster truck styling

Oversized wheels and a raised chassis give the model its Monster Jam look, layered here with a dinosaur theme that fits the ThunderROARus name. Black and light bluish grey form the structural core of axles and body panels, while red and blue add bold accents across the chassis and detailing. Together, the colours make the truck instantly readable as a Monster Jam vehicle even before the pull-back function comes into play. The dinosaur theme carries through into small details like jagged trim and scale-like panels, giving the truck extra character beyond its size and colour scheme.

An entry point into Technic

With 63 unique parts, the set stays compact enough for builders new to the Technic system, while still introducing the axles, pins and moving parts that larger Technic sets build on. For anyone who has only built with standard bricks before, this is a manageable first step into functional mechanisms, packed into a 232-piece build that does not demand prior Technic experience. Those same fundamentals carry over to larger, more advanced Technic sets later on, making this a sensible entry point into the wider range.

Checking the build

The exact mix of black, light bluish grey, red and blue parts is listed on this page, piece by piece. That makes it easy to see which Technic axles or pins are included before buying, whether to compare with other vehicle sets or to track down a specific replacement part. Because axles and pins are built similarly across many Technic sets, checking the list here also makes it easier to spot common ground with other models and plan future additions to a collection.

FAQ

Does the truck need batteries?
No, it runs on a purely mechanical pull-back spring mechanism with no batteries or motor required.
How many pieces does the set have?
The set contains 232 pieces across 63 unique elements.
Is this a good first Technic set?
Yes, its compact 232-piece build with a simple pull-back mechanism makes it a reasonable starting point for the Technic range.

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