LEGO Reviews Technic42112

Concrete Mixer Truck

Name: LEGO Concrete Mixer Truck 42112
Brand: LEGO
SKU: 42112
Rating: 4.8 (597 reviews)

85 · HIGHLY RECOMMENDEDINVESTMENT GRADE: AA20201,163 pcsHigh agreement · 97%

Expert reviews

2analyzed

Owner ratings

597

Consensus

BUY

BrickScore

Highly Recommended

Owners

Synthesized Verdict

"A landmark Technic set that finally delivers what fans had long requested. The innovative barrel mold, mechanical depth, and dark blue styling earn genuine praise from critics and a 4.8/5 owner average across nearly 600 ratings, making it one of the more broadly celebrated mid-tier Technic sets."

The Technic Concrete Mixer Truck earns a BrickScore of 85 and a Highly Recommended tier, with expert reviewers from Brickset and The Brothers Brick both recommending it as the first-ever LEGO Technic concrete mixer. The set's brand-new two-part barrel mold with an internal Archimedes screw, three-mode gearbox, proportional steering, and differential gearing impressed critics, and owner sentiment is similarly strong: 597 ratings average 4.8/5 with a 97% would-recommend rate. One Brickset reviewer called it 'pretty much the perfect Technic set.'

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LOVED (7)

01Brand-new mixer barrel mold with internal Archimedes screw, a genuine parts innovation
02Three-position gearbox allowing barrel to turn with wheels, be hand-cranked, or sit in neutral
03Proportional steering on the front two axles and differential gearing on the rear
04Attractive dark blue color scheme, a welcome departure from standard yellow construction aesthetics
05Smooth, reliable operation of all mechanical functions
06Good learning set for Technic newcomers to understand gearing and drivetrain concepts
07Motorization-compatible design

CRITICIZED (7)

01Yellow steering rod is visually jarring and inconsistent with the rest of the color scheme
02Engine placed between driver and passenger seats looks unrealistic, though it makes the moving pistons visible
03Visible gap between cab and mixer barrel makes the model look unfinished from the side
04Over 350 of 1,163 parts are Technic pins, which affects perceived parts value
05Price-per-piece above $0.10 makes it a poor parts pack relative to unlicensed Technic sets
06Sticker sheet required for final detailing
07No upper loading hopper noted by some owner reviewers as a real-world accuracy omission

What reviewers are saying

"I reckon this is pretty much the perfect Technic set."

Brickset Reviews

"Technic fans have been asking for a concrete mixer for ages… Can this offering satisfy that demand?"

The Brothers Brick

Ecosystem

7990 (earlier concrete mixer) — 42112 is larger, more detailed brother/cousin to the smaller earlier concrete mixer set, with more functionality and realistic design

TechnicTier 2Investment Grade

By Reviewer · 2

Avg score

Consensus

BUY

Brickset Reviews

Editorial Source

BUY

"I reckon this is pretty much the perfect Technic set."

Key Pros

✓Innovative new cylinder part enables authentic concrete mixer design
✓Excellent functionality with multiple play modes
✓Proportional steering and differential gearing add mechanical sophistication

Key Cons

✕Yellow axle for steering is unsightly and visually jarring
✕Engine placement between driver and passenger seats looks odd and unrealistic, though allows mechanism visibility

READ FULL REVIEW

The Brothers Brick

Expert Video Source

BUY

"Technic fans have been asking for a concrete mixer for ages… Can this offering satisfy that demand?"

Key Pros

✓Fulfills long-standing community request for a concrete mixer
✓Brand-new mixer barrel mold is innovative and well-executed
✓Excellent play features and mechanics work smoothly

Key Cons

✕Not great value as a parts pack (over 10 cents per piece)
✕Exposed engine between cab seats is unrealistic and detracts from realism

JUMP TO REVIEW

Dimensional Analysis

Investment Layer

Buy now (1)Wait for sale (0)

Exclusivity

Brickset Reviews: Wide retail release, not exclusive

Resale

Brickset Reviews: The new cylinder parts will become expensive on secondary market if not released separately, but overall set may hold value due to novelty

Minifigures & Standout Parts

Standout parts (per reviewers)

Two mixer cylinder halves with internal Archimedes screw
Brand new custom part, expensive to develop, enables authentic concrete mixer design for first time in Technic; about 20cm long and 10cm diameter with printed logo and internal mechanism
Dark blue re-coloured parts
Complementary colour variant used for visual distinction and model styling
Mixer barrel (new mold)
Brand new mold featuring interior Archimedes screw that pulls things deeper into the barrel or sends them spiraling towards the exit depending on rotation direction. Features printed logo on both halves. Each half measures 6.5 x 13 x 26 studs.
Dark blue Technic flat panel
Only previously seen in this color in 2013's 41999 4×4 Crawler Exclusive Edition
Dark blue Technic elements (various)
Several elements haven't been seen since the 2018 42083 Bugatti Chiron or as far back as 2005 Bionicle sets
New clutch (white element)
Previously seen only in the high-end Volvo hauler and 42100 Liebherr R 9800 Excavator

What Owners Say · summarized from 13 written reviews (LEGO, Amazon, Walmart)

Owners consistently praise this Technic set for clever engineering, smooth functions, and engaging builds, though a few report durability issues and note the hand crank is loose.

COMMON PRAISE