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US stock · technic parts and 1:87 rail

Bench › Gears and Axles › 270-Piece Gear, Differential and Rack Set

270-Piece Gear, Differential and Rack Set
  • 270-Piece Gear, Differential and Rack Set — view 2
  • 270-Piece Gear, Differential and Rack Set — view 3
  • 270-Piece Gear, Differential and Rack Set — view 4
  • 270-Piece Gear, Differential and Rack Set — view 5

270-Piece Gear, Differential and Rack Set

Gears and Axles drawer

4.6 out of 5 · 56 ratings on the product listing

$19.99

Two hundred and seventy pieces weighted toward the hard parts: differentials, gearbox racks, universal joints and tank track links.

Stock and the price you pay are shown on the product listing.

In the pack

  • This listing packing including variety technical parts, total 270 pieces. Technic parts pack, compatible with LEGO® Technic parts,The color is random
  • Many kinds of Gear Differential Gearbox rack, pin connector with/without friction, Track Tank Wheel, Chain Link, Shaft Sleeve, Shock Absorber and Cross Axle Series and etc
  • STEM activity kit,DIY creative model, can be freely assembled to create new design.Perfect compatibility, easy to assemble and disassemble, good compatibility between brick parts, neither loose nor tight
  • Various accessories can be widely applied to MOC model construction and creation

On the bench

The pieces that decide whether a model drives or just sits are the expensive ones to buy singly. A differential housing, a length of rack for a steering box, shock absorbers with usable spring rates, chain links for a track drive, shaft sleeves that keep an axle from wandering. This pack puts them together with the pin connectors you need to mount them, in friction and frictionless versions so a joint can be either a hinge or a lock.

How it behaves in a build

Builders tell us this is the pack that moves a project from a static shell to a rolling chassis. We would reach for it when you already own plenty of beams and the bottleneck is mechanism rather than structure. Because the mix leans toward complete subassemblies, it also makes a decent repair box for a set that came apart and lost its gearbox internals. Colours are random, which matters less here since most of these parts end up hidden inside the model.

Fit and compatibility

Compatible with LEGO® technic parts and the equivalent ranges from other major brands, with the fit kept firm enough to hold under load.

What builders wrote about this pack

  • 5.0 ★

    Excellent value

    Great value for 3rd party LEGO parts, some of the peghole connectors can feel pretty stiff but everything fits.

    Jon Charron · December 2, 2025

More from the Gears and Axles drawer

More ASTEM technic parts: gears, axles and compatible building block sets

Builders rarely stop at one drawer, and the ASTEM collection is laid out with that in mind. Across the technic shelves the geometry is constant — one technic gear module, one axle cross, one pin diameter — which is what makes a mixed building set LEGO® compatible in practice. When builders describe the experience of a pack — clean, tight, or fiddly — that customer note goes straight onto the bench.