what is the size of truck and trailer combined?

Truck is 14" and the trailor is 6.5"

what type of wax should be used for the gears?

Well I use a nightlight candle , or the piece of wax provided , but I don't think I've got the answer yet ! I'm yet to get one of the very complex kits to work satisfactorily.

Can they be painted during the build process

My Hubby didn't complete this model because there were too many fiddly parts. I think it would be difficult to paint during the building process.

Is it possible to buy spare parts if broken

I have ordered 2 replacement parts via the ugears website. On both occasions, ugears sent me two copies of the broken part. Their follow-up service is excellent.

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UGEARS Heavy Boy Truck 3D Puzzle - VM-03 Mechanical Wooden Model Kits for Adults to Build - DIY Wood American Truck with Working Engine 3D Wooden Puzzles for Adults Gift for Christmas

Product ID: 68884414

Details

Brand
UGEARS
Cartoon character
Truck
Educational objective
Creative Motor
Included components
541 wooden
Manufacturer Minimum Age (MONTHS)
168.00
Material
Engineered

🔧Rubber band-powered 6-cylinder engine

🚛3-mode transmission system

⚙️541 precision wooden pieces

819.95 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚛 Build the legend. Own the road. Master the mechanics.

EDUCATIONAL MINDFUL CRAFTING - Sharpen your mechanical engineering insight and motor skills while indulging in a relaxing, screen-free creative challenge.
DYNAMIC MECHANICAL FUNCTIONALITY - Engage the rubber band-powered six-cylinder engine with forward, reverse, and idle modes for a hands-on mechanical adventure.
INTRICATE ENGINEERING MASTERPIECE - Experience the thrill of building a fully functional mechanical truck with 541 interlocking wooden pieces—no glue needed.
AUTHENTIC AMERICAN TRUCK DETAILING - From ten wheels to dual exhaust stacks, every iconic feature is captured in stunning natural wood craftsmanship.
THE ULTIMATE GIFT FOR MAKERS DREAMERS - Perfect for professionals craving a nostalgic escape or a unique desk centerpiece that sparks conversation and admiration.

The UGEARS Heavy Boy Truck 3D Puzzle is a sophisticated wooden mechanical model kit featuring 541 precision-cut pieces that assemble into a detailed American semi-truck with a working rubber band-powered six-cylinder engine and three-mode transmission. Designed for adults and intermediate builders, it offers an immersive educational experience in mechanical engineering principles without the need for glue or tools, making it a perfect gift for enthusiasts and professionals seeking a creative, hands-on challenge.

Specifications

ASIN	B07DNF2ZJG
Age Range Description	Adult
Best Sellers Rank	113,888 in Toys & Games ( See Top 100 in Toys & Games ) 754 in 3-D Puzzles
Brand Name	UGEARS
Colour	Natural Wood
Country Of Origin	Ukraine
Customer Reviews	4.6 4.6 out of 5 stars (1,598)
Educational Objective	Creative Thinking, Motor Skill
Global Trade Identification Number	04820184120860
Included Components	541 wooden pieces
Indoor Outdoor Usage	Indoor
Is Assembly Required	Yes
Item Dimensions	37.8 x 17 x 5 centimetres
Item Dimensions L x W	37.8L x 17W centimetres
Item Shape	Rectangular
Item Weight	1300 Grams
Manufacturer	UGEARS
Manufacturer Part Number	70056
Material Type	Engineered Wood
Material Type Free	Wood, Plastic Free, Latex Free, Lead Free, Bisphenol-A (BPA) Free, Phthalate Free, Polyvinyl Chloride (PVC) Free
Maximum Age Recommendation	1188.00
Minimum Age Recommendation	168.00
Model Number	70056
Number of Items	1
Number of Packs	1
Number of Pieces	541
Number of Players	1
Operation Mode	Manual
Play Activity Location	Tabletop
Product Style	Heavy Boy Truck
Puzzle Type	Assembly & Disassembly
Set Name	Heavy Boy Truck VM-03
Size	541 bitar eller 170mm x 378mm
Skill Level	Intermediate
Special Features	Self-propelled with rubber band motor
Subject Character	Truck
Theme	Vehicles
Unit Count	1 1

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819.95 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

View all Trustpilot reviews