LEGO 10426 Train Bridge and Tracks Expansion Set: Set Guide

Specifications

Set number	10426
Release year	2025
Piece count	42
Minifigures	0
Theme	Duplo
Subtheme	Trains
Building instructions	Download the instructions on lego.com

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LEGO DUPLO 10426, Train Bridge and Tracks Expansion Set, is a rail expansion with a bridge for the DUPLO Trains theme. Released in 2025, it contains 42 pieces and is designed to extend existing layouts without including any figures.

Set 10426 belongs to the LEGO DUPLO theme, specifically the Trains line. Its subject is not a complete train, but an extension of the railway environment, adding track sections and a bridge to a compatible DUPLO train layout.

The set contains 42 pieces.

It is mainly suited to play with existing DUPLO trains.

Inventory of set 10426

The inventory of set 10426 lists 42 pieces, spare parts excluded: 18 different lots (one shape in one color) for 15 part shapes.

Colors of set 10426

Main color: light bluish gray, making up 38% of the parts, followed by bright green (17%) and lime (14%).

Color	Parts	Share
Light Bluish Gray	16	38%
Bright Green	7	17%
Lime	6	14%
Tan	4	9.5%
Reddish Orange	2	4.8%
Dark Blue	1	2.4%
White	1	2.4%
Dark Azure	1	2.4%
Red	1	2.4%
Yellowish Green	1	2.4%
Other colors (2)	2	4.8%

Part types

Type	Parts	Share
Duplo, Quatro and Primo	41	98%
Non-Buildable Figures (Duplo, Fabuland, etc)	1	2.4%

Most common parts in set 10426

Part	Color	Quantity
Duplo Train Track 4 x 8 Straight 6377	Light Bluish Gray	8
Duplo Brick 2 x 2 3437	Lime	4
Duplo Brick 2 x 2 3437	Bright Green	4
Duplo Brick 2 x 2 3437	Light Bluish Gray	4
Duplo Brick Round 2 x 2 x 2 98225	Tan	4
Duplo Brick 2 x 4 3011	Lime	2
Duplo Brick 2 x 4 3011	Bright Green	2
Duplo Frame / Girder / Support, Half Circle 2 x 14 x 6 4731	Reddish Orange	2
Duplo Train Track, Bridge Lower Section 5086	Light Bluish Gray	2
Duplo Train Track Bridge Middle Section with 2 x 2 Studs on Both Sides 5087	Light Bluish Gray	2

7 of the 15 part shapes in this set have their own page on Setopedia, with their colors, element numbers and the other sets that use them. See all LEGO parts

Exclusive parts in set 10426

4 part shapes in set 10426 appear in no other set in the catalog, most often printed elements, stickers or molds specific to the model. If one gets lost, you will need to look for it individually, for example on BrickLink, rather than in another set. Counting colors, 5 lots in the set are not found in any other set.

Part	Color
Duplo Train Track Bridge Middle Section with 2 x 2 Studs on Both Sides 5087	Light Bluish Gray
Duplo Train Track, Bridge Lower Section 5086	Light Bluish Gray
Duplo Figure with Construction Helmet White, Reddish Brown Hair, with Vibrant Yellow Vest, Dark Blue Legs 97900pr0001	Vibrant Yellow
Duplo Train Action Plate with White Stripe in Circle Print, Stop Action 35962pr0007	Red

Rebuilding set 10426 from another set

Share of the parts of set 10426 found in each of these similarly sized sets, counting shape, colour and quantity:

Set	Found	Parts	Release year
45012 Wild Animals Set	38%	104	2015
9213 Dinosaurs Set	36%	92	2007
5548 Building Fun	31%	81	2010
10565 Creative Suitcase	31%	135	2014
4629 Build and Play Box	31%	150	2012

No similarly sized set goes above 38%: the model relies on a little-shared assortment, most of which has to be gathered piece by piece.

Size of set 10426 within its line

With 42 pieces, set 10426 ranks #378 out of 522 Duplo sets in our database, which have an average of 69 parts. Among the 625 sets released in 2025, it ranks #587.

Frequently asked questions

How many pieces does LEGO set 10426 Train Bridge and Tracks Expansion Set have?

LEGO set 10426 Train Bridge and Tracks Expansion Set has 42 pieces. It was released in 2025 as part of the Duplo theme.

What year was LEGO set 10426 released?

Set 10426 Train Bridge and Tracks Expansion Set was released in 2025 and belongs to the Duplo theme.

Which minifigures are included in set 10426?

LEGO set 10426 Train Bridge and Tracks Expansion Set does not include any minifigures.

Where can I find the building instructions for set 10426?

The instructions for LEGO set 10426 Train Bridge and Tracks Expansion Set can be downloaded free as a PDF from the official lego.com website, under “Building Instructions”, by entering the number 10426.

What is the main color of LEGO set 10426?

Light bluish gray, with 16 out of 42 pieces, or 38%. Next come bright green (17%) and lime (14%).

How many different parts does set 10426 contain?

Set 10426 has 18 different lots (one shape in one color), covering 15 part shapes. Most common part: Duplo Train Track 4 x 8 Straight in light bluish gray, with 8 copies.

Does LEGO set 10426 contain any exclusive parts?

Yes: 4 part shapes exist in no other set, for example: Duplo Train Track Bridge Middle Section with 2 x 2 Studs on Both Sides.

Which similarly sized set contains the most parts from set 10426?

Set 45012 Wild Animals Set, released in 2015: it supplies 38%, counting shapes, colors and quantities.