3D Printed Wooden Train Tunnel for Brio Tracks

Design preview. Rendered from the file, not a photo.

The maker says it fits: Brio train system. See the proof

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What it does

Splits into two pieces so it fits in your printer, then glues together for a full tunnel that works with Brio trains
Updated entrance design gives your train cars better clearance so they roll through without getting stuck
Includes a connector system so you can print just what you need and build the tunnel your way
You get a custom toy tunnel made on demand, so you skip the wait and get exactly what fits your track layout

Your child's train set comes alive when the tracks disappear into a real tunnel. This 3D printed tunnel works with Brio train systems and lets you create a whole world on your table.

The tunnel prints in two pieces that you glue together, so it fits any home printer. The entrance parts have been refined for a perfect fit with your train cars. A connector piece makes the build simple, and you choose how many sections you want printed.

This is a custom on-demand design, which means you get exactly what you order without waste. Your kid gets to watch trains vanish and reappear through a tunnel they helped build.

6.0k downloads in the maker community. That is interest in the design on the site it came from, not our sales.

What it fits

The maker says it fits: Brio train system

That is the maker's word, not a fit we measured. Check the size below against your own.

Brio train systemFrom the maker's own listing title, checked 2026-08-13. See the original post

Brand names here only say what this part fits. We are not connected to those companies, and they did not make or check this part.

What you get

This design prints as one piece.
Nothing else to print or buy for this to work.

What it is made of

Designs like this print well in PLA. Compare the materials.

Printed plastic is strong for its size, but it is not metal. We have not load tested this design, so we do not publish a weight rating. Keep it out of a hot car and away from open flame.