LEGO 42121

Heavy-Duty Excavator

Technic

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— Rank in Technic: #3

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Prices at UK retailers

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What Makes this set WOW?

2-in-1 model: The set offers additional value by rebuilding the excavator into a tracked tractor with a backhoe, significantly extending play and building time.

Realistic gear system: Two separate knobs control the movement of the boom and bucket, allowing for precise scooping of material and learning the basic principles of mechanics in practice.

Full 360-degree mobility: The model moves on tracks composed of 86 individual links, and its body rotates around its own axis, which faithfully reflects the functionality of real construction equipment.

Accessories for interactive play: The box contains 4 road cones and 20 gray elements imitating stones, which allows you to immediately test the bucket mechanism and play scenes.

Set details

LEGO Heavy-Duty Excavator (set #42121) is a Technic set released in 2021, made up of 569 pieces.

Set number: #42121
Theme: Technic
Year released: 2021
Pieces: 569

Price history will appear here once we've tracked this set for a few days.

Common questions about Heavy-Duty Excavator

What is LEGO Heavy-Duty Excavator?▾

LEGO Heavy-Duty Excavator (set #42121) is a set from the Technic range, released in 2021, made up of 569 pieces.

Is LEGO Heavy-Duty Excavator being retired?▾

We don't currently see signs that this set is retiring imminently, but LEGO doesn't publish official retirement dates in advance, so availability can still change.

Where can I buy LEGO Heavy-Duty Excavator cheapest in the UK?▾

We're not currently tracking an active offer for this set — check the retailers listed above, or set a price alert to get notified when one appears.