# LEGO 42105-1 — Catamaran (2020)

Source: https://www.brickmissing.com/sets/42105-1-catamaran
Publisher: BrickMissing (https://www.brickmissing.com) — free LEGO parts checker. Not affiliated with the LEGO Group.

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.

## Set facts

- Set number: 42105-1
- Name: Catamaran
- Theme: Technic
- Released: 2020
- Pieces: 405
- Distinct part + colour lots: 76
- Build difficulty: intermediate
- Repairability: 3.9% of this set's lots are hard to replace (3 of 76 part+colour combinations appear in three or fewer sets in the entire LEGO catalog).

## Complete parts list (76 lots, 405 pieces)

Prices are the official LEGO Pick a Brick price per individual part, where LEGO publishes one.

| Qty | Part | Colour | Part no. | LEGO element ID | LEGO price each |
| ---: | --- | --- | --- | --- | --- |
| 2 | Technic Axle Pin 3L with Friction Ridges Lengthwise and 1L Axle | Red | 11214 | 6209519 | €0,29 |
| 3 | Technic Panel Fairing #21 5L Small Smooth, Side B | Black | 11946 | 6316923 | €0,38 |
| 2 | Technic Panel Fairing #21 5L Small Smooth, Side B | Lime | 11946 | 6340657 | €0,38 |
| 3 | Technic Panel Fairing #22 5L Small Smooth, Side A | Black | 11947 | 6319983 | €0,38 |
| 2 | Technic Panel Fairing #22 5L Small Smooth, Side A | Lime | 11947 | 6352667 | €0,38 |
| 7 | Technic Pin Connector Hub with 1 Pin with Friction Ridges Lengthwise | Dark Bluish Gray | 15100 | 6175330 | — |
| 4 | Technic Axle 5 with Stop | Reddish Brown | 15462 | 6159763 | €0,11 |
| 2 | Steering Wheel Small, 2 x 2 [Reinforced] | Black | 16091 | 6057397 | €0,11 |
| 2 | Technic Gear 20 Tooth Double Bevel with Axle Hole Type 1 [+ Opening] | Tan | 18575 | 6346517 | €0,36 |
| 16 | Technic Pin Connector Round 1L [Beam] | Light Bluish Gray | 18654 | 6183784 | €0,05 |
| 6 | Technic Driving Ring Connector | White | 18948 | 6276052 | €0,23 |
| 1 | Technic Pin Connector Hub with 1 Axle | Light Bluish Gray | 22961 | 6123815 | €0,13 |
| 2 | Technic Axle 11 | Yellow | 23948 | 6130012 | €0,29 |
| 8 | Technic Axle 3 with Stop | Reddish Brown | 24316 | 6135494 | €0,07 |
| 3 | Technic Axle Towball | Light Bluish Gray | 2736 | 4211375 | €0,13 |
| 47 | Technic Pin with Friction Ridges Lengthwise and Center Slots | Black | 2780 | 278026 | — |
| 2 | Technic Worm Gear Short | Dark Bluish Gray | 27938 | 6170153 | €0,68 |
| 1 | Technic Pin Connector Hub with 2 Axles | Dark Bluish Gray | 27940 | 6167281 | €0,17 |
| 4 | Technic Axle and Pin Connector Angled #1 | Dark Bluish Gray | 32013 | 6296856 | €0,08 |
| 2 | Technic Axle and Pin Connector Angled #6 - 90° | Dark Bluish Gray | 32014 | 6268923 | €0,22 |
| 7 | Technic Axle and Pin Connector Angled #2 - 180° | Dark Bluish Gray | 32034 | 6271876 | €0,11 |
| 9 | Technic Axle Connector with Axle Hole | Black | 32039 | 3203926 | — |
| 8 | Technic Pin Long with Friction Ridges Lengthwise and Stop Bush [3 Lateral Holes, Big Pin Hole] | Light Bluish Gray | 32054 | 4211865 | — |
| 8 | Technic Beam 3 x 3 L-Shape Thin | Dark Bluish Gray | 32056 | 6271814 | €0,31 |
| 15 | Technic Axle 2 Notched | Red | 32062 | 4142865 | €0,07 |
| 5 | Technic Bush 1/2 Smooth with Axle Hole Semi-Reduced | Light Bluish Gray | 32123b | 6271165 | €0,04 |
| 2 | Technic Beam 2 x 4 L-Shape Thick | Lime | 32140 | 6271826 | €0,15 |
| 2 | Technic Axle and Pin Connector Perpendicular 3L with Centre Pin Hole | Dark Bluish Gray | 32184 | 6276984 | €0,12 |
| 3 | Technic Gear 12 Tooth Double Bevel | Black | 32270 | 4177431 | €0,18 |
| 7 | Technic Beam 1 x 15 Thick | Dark Bluish Gray | 32278 | 4542576 | €0,42 |
| 2 | Technic Beam 1 x 15 Thick | Lime | 32278 | 4141734 | — |
| 4 | Technic Axle and Pin Connector Perpendicular Double | Light Bluish Gray | 32291 | 6280396 | €0,15 |
| 4 | Technic Link 1 x 9 | Black | 32293 | 6244698 | €0,36 |
| 3 | Technic Beam 1 x 5 Thick | Dark Bluish Gray | 32316 | 4210686 | €0,19 |
| 2 | Technic Beam 1 x 5 Thick | Lime | 32316 | 4661486 | €0,19 |
| 2 | Technic Beam 1 x 7 Bent (4 - 4) Thick | Dark Bluish Gray | 32348 | 32348199 | — |
| 2 | Technic Beam 1 x 3 Thick | White | 32523 | 4208160 | €0,10 |
| 1 | Technic Beam 1 x 3 Thick | Dark Bluish Gray | 32523 | 4210751 | €0,10 |
| 2 | Technic Beam 1 x 3 Thick | Lime | 32523 | 6170474 | €0,10 |
| 4 | Technic Beam 1 x 7 Thick | Dark Bluish Gray | 32524 | 4495931 | €0,25 |
| 1 | Technic Beam 1 x 11 Thick | Dark Bluish Gray | 32525 | 4603472 | €0,33 |
| 2 | Technic Beam 1 x 11 Thick | Lime | 32525 | 4157372 | — |
| 5 | Technic Beam 3 x 0.5 Liftarm with Boss and Pin Semi-Reduced | Black | 33299b | 4563044 | — |
| 8 | Technic Axle 4 | Red | 3705 | 6129995 | €0,08 |
| 2 | Technic Axle 6 | Black | 3706 | 370626 | €0,12 |
| 8 | Technic Bush | Light Bluish Gray | 3713 | 6275844 | €0,05 |
| 3 | Technic Axle 10 | Black | 3737 | 373726 | €0,25 |
| 1 | Technic Axle Pin without Friction Ridges Lengthwise | Tan | 3749 | 4666579 | €0,06 |
| 2 | Technic Beam 1 x 9 Thick | White | 40490 | 6001831 | €0,29 |
| 1 | Technic Beam 1 x 13 Thick | Dark Bluish Gray | 41239 | 4522937 | €0,39 |
| 4 | Technic Axle and Pin Connector Perpendicular Double Split | Light Bluish Gray | 41678 | 4211889 | — |
| 6 | Technic Axle and Pin Connector Perpendicular 3L with 2 Pin Holes | Orange | 42003 | 6330986 | €0,12 |
| 9 | Technic Pin 1/2 | Light Bluish Gray | 4274 | 4211483 | €0,05 |
| 33 | Technic Axle Pin with Friction Ridges Lengthwise | Black | 43093 | 4206482 | €0,06 |
| 2 | Technic Axle 7 | Yellow | 44294 | 6130009 | €0,16 |
| 9 | Technic Axle 3 | Light Bluish Gray | 4519 | 4211815 | €0,05 |
| 1 | Technic Pin Connector Hub Perpendicular 3L with 4 Pins | Light Bluish Gray | 48989 | 4225033 | — |
| 10 | Technic Axle Connector Smooth [with x Hole + Orientation] | Dark Bluish Gray | 59443 | 4516546 | €0,06 |
| 7 | Technic Beam 1 x 2 Thick with Pin Hole and Axle Hole | Black | 60483 | 6265091 | €0,07 |
| 3 | Technic Beam 3 x 3 T-Shape Thick | Dark Bluish Gray | 60484 | 4552349 | €0,18 |
| 1 | Technic Axle 9 | Light Bluish Gray | 60485 | 4535768 | €0,21 |
| 1 | Plate Round 1 x 1 with Solid Stud | Trans-Red | 6141 | 6208450 | €0,04 |
| 1 | Plate Round 1 x 1 with Solid Stud | Trans-Clear | 6141 | 6514052 | €0,04 |
| 1 | Plate Round 1 x 1 with Solid Stud | Trans-Green | 6141 | 6514057 | €0,05 |
| 1 | Technic Beam 5 x 11 with 3 x 5 Opening Frame Thick | Light Bluish Gray | 64178 | 4540797 | €1,26 |
| 2 | Technic Gear Rack 1 x 13 with Axle and Pin Holes | Black | 64781 | 4540906 | — |
| 8 | Technic Axle and Pin Connector Perpendicular | White | 6536 | 6261372 | €0,10 |
| 17 | Technic Pin Long with Friction Ridges Lengthwise, 2 Center Slots | Black | 6558 | 4514553 | — |
| 2 | Boat / Pontoon 36 x 7 x 7 with Blue Bottom | Lime | 65781 | 6285651 | — |
| 14 | Technic Pin with Friction Ridges Lengthwise and Towball | Black | 6628 | 4184169 | — |
| 12 | Technic Beam 1 x 3 Thin | Dark Bluish Gray | 6632 | 6364452 | €0,25 |
| 6 | Technic Beam 1 x 3 Thin | White | 6632 | 6360038 | €0,25 |
| 1 | Sail, Triangular, with 'Kool Keels Anchor Bouy', '42105', and Waves with Dots Print | Unknown | 66645a | — | — |
| 1 | Sail, Triangular, with Waves with Dots Print | Unknown | 66645b | — | — |
| 5 | Technic Axle 4 with Stop | Dark Bluish Gray | 87083 | 6083620 | €0,07 |
| 4 | Technic Rotor Blade Small with Hole and Axle Connector End | Dark Bluish Gray | 99012 | 6271639 | €0,30 |

## Notes

- Track which of these parts you own and see what is missing: https://www.brickmissing.com/sets/42105-1-catamaran
- Inventory data is based on official LEGO inventories via the Rebrickable catalog, updated daily.
- Part images, minifigure lists and related sets are on the set page: https://www.brickmissing.com/sets/42105-1-catamaran