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LEGO part 4185: Technic Wedge Belt Wheel [aka Pulley]

Wheels and Tyres23 colours428 sets

LEGO part LEGO part 4185: Technic Wedge Belt Wheel [aka Pulley]

Specifications

Reference4185
CategoryWheels and Tyres
MaterialABS plastic
Colours23
Sets428
Listed pieces1,922
First appearance1995
Latest appearance2026
Element (Light Bluish Gray)6321743 · 4494222
Most common colourLight Bluish Gray
SetopediaData: Rebrickable
Spec sheet updated on 2026-09-29

LEGO part 4185, Technic Wedge Belt Wheel [aka Pulley], belongs to the Wheels and Tyres category. It exists in 23 colours and appears in 428 sets of our database, from 1995 to 2026, for a total of 1,922 listed pieces. Its most common colour is Light Bluish Gray.

Number 4185 identifies the shape and is moulded under the part. Each colour also has its own element ID, the one Pick a Brick uses: in light bluish gray, it is 6321743.

Part 4185 through the years

The oldest set in our database that contains part 4185 is 8485 Control Centre / Control II, released in 1995 in the Technic theme. It is still in use: the most recent set featuring it, 11377 The Lord of the Rings: Minas Tirith, dates from 2026.

Its peak year is 2017, with 23 sets containing it. The set with the most copies is 9784 ARCTIC IMPACT Challenge Kit: 140 copies, against an average of 4.5 per set.

It is spread across several themes, led by Technic (18%), Star Wars (13%) and Educational and Dacta (12%). With 428 sets, it ranks no. 397 of 2,731 parts in our database and no. 4 of 100 in the Wheels and Tyres category.

Sets containing part 4185, by period

PeriodSets
1995-199957
2000-2009106
2010-2019142
2020-2026123

Colours of part 4185

4 colours appear in only one set: dark turquoise (80018 Monkie Kid's Cloud Bike), trans-neon green (6572 Wind Runners), dark blue (10358 Transformers: Soundwave) and dark pink (43296 Stitch & Scrump). 5 of its 23 colours are transparent.

Colour (element ID)SetsPiecesExample sets
Light Bluish Gray6321743 · 4494222105381421284217510294
Light Gray4100502 · 41850274270848055718458
Dark Bluish Gray6321744 · 458727559278421754214671769
Black6323668 · 619213040189421274213010497
Yellow6636439 · 63632733384421314200975092
White6564907 · 633013630150753764210380036
Lime6335116 · 44942192712442120110199445
Pearl Gold6323675 · 62579022264717657176810273
Trans-Light Blue6514360 · 63213511451752577532575092
Trans-Neon Orange6124680 · 41726011233751883106670589
Brown4162482 · 41074638163741934516495
Trans-Clear6062324 · 4101678827751037515275100
Tan6518933 · 45865637468095102147656
Reddish Brown6170896 · 456180761170617709157093
Orange6533559 · 45404245117700371588101
Green6515235 · 4240282310721687545210370
Red6532101 · 42402793475452103588279
Flat Silver65332412121138960466
Trans-Orange6430977 · 6328510267624580018
Dark Turquoise63270801480018
Trans-Neon Green4113856126572
Dark Blue65512621110358
Dark Pink66109411143296

Where to buy part 4185

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

Search part 4185 on AmazonPick a Brick (lego.com)BrickLink entryRebrickable entry

Sets that include part 4185

Sets ranked by popularity that include at least one part 4185, in any colour.

Related parts

Often found with part 4185

Parts that share the most sets with part 4185, based on set inventories.

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 4185?

Part 4185 (Technic Wedge Belt Wheel [aka Pulley]) appears in 428 sets listed on Setopedia, from 1995 to 2026, in any colour.

Which LEGO set contains the most copies of part 4185?

Set 9784 ARCTIC IMPACT Challenge Kit, released in 2001, contains 140 copies, the highest count in our database. On average, a set containing part 4185 has 4.5.

Which colours does LEGO part 4185 come in?

23 colours are listed for part 4185. The most common is Light Bluish Gray, found in 105 sets.

What is the rarest colour of part 4185?

According to our inventories, it is dark blue, found in only 1 set (10358 Transformers: Soundwave).

What is the element ID of part 4185 in light bluish gray?

In light bluish gray, part 4185 has element ID 6321743 or 4494222. Number 4185 is the mould number, the same for every colour.

Is LEGO part 4185 still used in recent sets?

Yes: it appears in sets released in 2026, such as 11377 The Lord of the Rings: Minas Tirith.

Where can I buy LEGO part 4185 individually?

Single parts 4185 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.