How many pieces does the LEGO Catamaran (42105-1) have?

The LEGO Catamaran set (42105-1) contains 405 pieces. It was released in 2020 as part of the LEGO Technic theme.

How can I find missing parts for LEGO set 42105-1?

On BrickMissing you can check which parts from the LEGO Catamaran (42105-1) you already own. Add your LEGO collection and we'll show exactly which of the 405 pieces you're missing and which you already have.

Can I build the LEGO Catamaran with parts I already have?

Use BrickMissing's free parts checker to find out. Add LEGO sets you own to your collection and we'll cross-reference all 405 parts to show your buildability percentage and which specific pieces you still need.

What theme is the LEGO Catamaran from?

The LEGO Catamaran (42105-1) belongs to the LEGO Technic theme. You can browse all Technic sets on BrickMissing to find more sets from this theme.

Catamaran

🏷️ 42105-1•🎨 Technic•📅 2020•🧱 405 parts•Intermediate

Navigate the open water with the LEGO Technic 42105 Catamaran. This 405-piece LEGO Technic Catamaran (42105-1) offers a realistic sailing experience, notably being the first Technic model designed to float directly on water. The classic 2-hull design authentically recreates a race boat, featuring functional sails that move, adjustable dagger boards to enhance stability, and a working rudder for steering control. Builders can explore the mechanics of boat racing, then take to the bathtub to test its buoyancy and maneuverability. The set also provides an alternate build, transforming the twin-hulled vessel into a powerful Race Power Boat for extended play and engineering exploration. This model serves as a detailed recreation, allowing enthusiasts to examine the intricacies of a racing catamaran.

Parts Inventory

🧱 405 parts

Part	Color	Qty
Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle 11214	Red	2×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Black	3×
Technic Panel Fairing #21 5L Small Smooth, Side B 11946	Lime	2×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Black	3×
Technic Panel Fairing #22 5L Small Smooth, Side A 11947	Lime	2×
Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise 15100	Dark Bluish Gray	7×
Technic Axle 5 with Stop 15462	Reddish Brown	4×
Steering Wheel Small, 2 x 2 [Reinforced] 16091	Black	2×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] 18575	Tan	2×
Technic Pin Connector Round 1L [Beam] 18654	Light Bluish Gray	16×

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Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise	15100	Dark Bluish Gray	7×
Technic Axle 5 with Stop	15462	Reddish Brown	4×
Steering Wheel Small, 2 x 2 [Reinforced]	16091	Black	2×
Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening]	18575	Tan	2×
Technic Pin Connector Round 1L [Beam]	18654	Light Bluish Gray	16×
Technic Driving Ring Connector	18948	White	6×
Technic Pin Connector Hub with 1 Axle	22961	Light Bluish Gray	1×
Technic Axle 11	23948	Yellow	2×
Technic Axle 3 with Stop	24316	Reddish Brown	8×
Technic Axle Towball	2736	Light Bluish Gray	3×
Technic Pin with Friction Ridges Lengthwise and Center Slots	2780	Black	47×
Technic Worm Gear Short	27938	Dark Bluish Gray	2×
Technic Pin Connector Hub with 2 Axles	27940	Dark Bluish Gray	1×
Technic Axle and Pin Connector Angled #1	32013	Dark Bluish Gray	4×
Technic Axle and Pin Connector Angled #6 - 90°	32014	Dark Bluish Gray	2×
Technic Axle and Pin Connector Angled #2 - 180°	32034	Dark Bluish Gray	7×
Technic Axle Connector with Axle Hole	32039	Black	9×
Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole]	32054	Light Bluish Gray	8×
Technic Beam 3 x 3 L-Shape Thin	32056	Dark Bluish Gray	8×
Technic Axle 2 Notched	32062	Red	15×
Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced	32123b	Light Bluish Gray	5×
Technic Beam 2 x 4 L-Shape Thick	32140	Lime	2×
Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole	32184	Dark Bluish Gray	2×
Technic Gear 12 Tooth Double Bevel	32270	Black	3×
Technic Beam 1 x 15 Thick	32278	Dark Bluish Gray	7×
Technic Beam 1 x 15 Thick	32278	Lime	2×
Technic Axle and Pin Connector Perpendicular Double	32291	Light Bluish Gray	4×
Technic Link 1 x 9	32293	Black	4×
Technic Beam 1 x 5 Thick	32316	Dark Bluish Gray	3×
Technic Beam 1 x 5 Thick	32316	Lime	2×
Technic Beam 1 x 7 Bent (4 - 4) Thick	32348	Dark Bluish Gray	2×
Technic Beam 1 x 3 Thick	32523	White	2×
Technic Beam 1 x 3 Thick	32523	Dark Bluish Gray	1×
Technic Beam 1 x 3 Thick	32523	Lime	2×
Technic Beam 1 x 7 Thick	32524	Dark Bluish Gray	4×
Technic Beam 1 x 11 Thick	32525	Dark Bluish Gray	1×
Technic Beam 1 x 11 Thick	32525	Lime	2×
Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced	33299b	Black	5×
Technic Axle 4	3705	Red	8×
Technic Axle 6	3706	Black	2×
Technic Bush	3713	Light Bluish Gray	8×
Technic Axle 10	3737	Black	3×
Technic Axle Pin without Friction Ridges Lengthwise	3749	Tan	1×
Technic Beam 1 x 9 Thick	40490	White	2×
Technic Beam 1 x 13 Thick	41239	Dark Bluish Gray	1×
Technic Axle and Pin Connector Perpendicular Double Split	41678	Light Bluish Gray	4×
Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes	42003	Orange	6×
Technic Pin 1/2	4274	Light Bluish Gray	9×
Technic Axle Pin with Friction Ridges Lengthwise	43093	Black	33×
Technic Axle 7	44294	Yellow	2×
Technic Axle 3	4519	Light Bluish Gray	9×
Technic Pin Connector Hub Perpendicular 3L with 4 Pins	48989	Light Bluish Gray	1×
Technic Axle Connector Smooth [with x Hole + Orientation]	59443	Dark Bluish Gray	10×
Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole	60483	Black	7×
Technic Beam 3 x 3 T-Shape Thick	60484	Dark Bluish Gray	3×
Technic Axle 9	60485	Light Bluish Gray	1×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Red	1×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Clear	1×
Plate Round 1 x 1 with Solid Stud	6141	Trans-Green	1×
Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick	64178	Light Bluish Gray	1×
Technic Gear Rack 1 x 13 with Axle and Pin Holes	64781	Black	2×
Technic Axle and Pin Connector Perpendicular	6536	White	8×
Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots	6558	Black	17×
Boat / Pontoon 36 x 7 x 7 with Blue Bottom	65781	Lime	2×
Technic Pin with Friction Ridges Lengthwise and Towball	6628	Black	14×
Technic Beam 1 x 3 Thin	6632	Dark Bluish Gray	12×
Technic Beam 1 x 3 Thin	6632	White	6×
Sail, Triangular, with 'Kool Keels Anchor Bouy', '42105', and Waves with Dots Print	66645a	Unknown	1×
Sail, Triangular, with Waves with Dots Print	66645b	Unknown	1×
Technic Axle 4 with Stop	87083	Dark Bluish Gray	5×
Technic Rotor Blade Small with Hole and Axle Connector End	99012	Dark Bluish Gray	4×

Build DNA

Parts inventory insights for Catamaran

405 pieces puts this build -37% against the average Technic set and -10% against the average 2020 release.

LEGOTECHNIC

Vs average Technic set

-37%-242 parts

This set405

Average set647

Average Technic set: 647 pieces across 450 other sets.

Vs average 2020 set

-10%-43 parts

This set405

Average set448

Average 2020 set: 448 pieces across 450 other sets.

Color profile

15different colors

Dominant color

Black

Black154x

38%

Dark Bluish Gray86x

21%

Light Bluish Gray70x

17%

Red25x

Unique parts

6.1 pieces per unique type

Repeat factor

Average pieces per unique type.

Most used part

Technic Pin with Friction Ridges Lengthwise and Center Slots

47x

Results are based on official LEGO part inventories. Accuracy improves as you confirm set completeness.

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Build Insights🧩66unique parts🎨15different colors📊27avg. parts per color🏆47×Technic Pin with Friction Ridges Lengthwise and Center Slots

🎨 All Technic sets 📅 All sets from 2020

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