Setobrick

LEGO part 43903: Tread Small (20 Links)

Wheels and Tyres1 colours30 sets

LEGO part LEGO part 43903: Tread Small (20 Links)

Specifications

Reference43903
CategoryWheels and Tyres
MaterialRubber
Colours1
Sets30
Listed pieces57
First appearance2003
Latest appearance2021
Element (Black)4180576
Most common colourBlack
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 43903, Tread Small (20 Links), belongs to the Wheels and Tyres category. It exists in 1 colours and appears in 30 sets of our database, from 2003 to 2021, for a total of 57 listed pieces. Its most common colour is Black.

Number 43903 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in black, it is 4180576.

Part 43903 through the years

The oldest set in our database that contains part 43903 is 7419 Dragon Fortress, released in 2003 in the Adventurers theme. No set in our database uses it after 2021, the year of 60302 Wildlife Rescue Operation. To get it today, look for older sets or buy it second-hand.

Its peak year is 2014, with 7 sets containing it. The set with the most copies is 70814 Emmet's Construct-o-Mech: 4 copies, against an average of 1.9 per set.

It is spread across several themes, led by City (33%), Legends of Chima (13%) and Agents (7%). With 30 sets, it ranks no. 2,177 of 2,731 parts in our database and no. 79 of 100 in the Wheels and Tyres category.

Sets containing part 43903, by period

PeriodSets
2003-20099
2010-201919
2020-20212

Colours of part 43903

Part 43903 exists in a single colour: black.

Colour (element ID)SetsPiecesExample sets
Black41805763057603026025260140

Where to buy part 43903

Setopedia shows no prices: they vary by colour, condition and seller. Amazon links are affiliate links.

Search part 43903 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 43903

Sets ranked by popularity that include at least one part 43903, in any colour.

Related parts

More parts in the Wheels and Tyres category

All parts in the Wheels and Tyres category

Frequently asked questions

How many LEGO sets include part 43903?

Part 43903 (Tread Small (20 Links)) appears in 30 sets listed on Setopedia, from 2003 to 2021, in any colour.

Which LEGO set contains the most copies of part 43903?

Set 70814 Emmet's Construct-o-Mech, released in 2014, contains 4 copies, the highest count in our database. On average, a set containing part 43903 has 1.9.

Which colours does LEGO part 43903 come in?

1 colours are listed for part 43903. The most common is Black, found in 30 sets.

What is the element ID of part 43903 in black?

In black, part 43903 has element ID 4180576. Number 43903 is the mould number, the same for every colour.

Is LEGO part 43903 still used in recent sets?

Not in our database: its last set dates from 2021 (60302 Wildlife Rescue Operation). Look for it in second-hand sets or on BrickLink.

Where can I buy LEGO part 43903 individually?

Single parts 43903 can be ordered on Pick a Brick (lego.com) in colours currently produced, or on BrickLink for older colours. The part is also included in the sets listed on this page.