Extra Roads for Spintronics: How to Expand Your Circuit
By Upper Story - Endless Curiosity | Published: 2026-10-18
Category: How-to Guides
Learn how to add extra roads to your Spintronics builds for bigger, more ambitious circuits. Step-by-step guide with common mistakes to avoid.
Quick Answer
Adding extra roads to your Spintronics builds is straightforward: you simply connect them to your existing Bridge or Bust roadway using the built-in connectors. This lets you extend the track for larger, more complex marble runs.
Why Add Extra Roads?
The base Bridge or Bust set includes enough roads for a standard build, but if you want to create longer, more elaborate marble runs—or combine multiple projects—you'll quickly run out of track. Extra roads give you the freedom to expand without being limited by the original components.
Each extra road piece is identical in size and connector type to the ones in the original set, so they integrate seamlessly. The only trade-off is that you'll need to plan your layout carefully to avoid running out of space on your work surface.
What to Consider Before Buying
Extra roads are sold individually, so you can buy exactly as many as you need. They work with all Bridge or Bust sets and don't require any special tools or adapters. However, because they are simple track pieces, they don't add any new functionality—just length. If you're looking for different types of obstacles or turns, those are not included in this product.
How to Add Extra Roads to Your Spintronics Build
- 1. Plan Your Extended Layout: Sketch or mentally map where you want the extra road to go. Identify the connection point on your existing roadway where the new piece will attach. Make sure the new road won't cause the marble to hit an obstacle or fall off the track.
- 2. Disconnect the Existing Roadway at the Junction: Gently separate the two road pieces at the point where you want to insert the extra road. The connectors are designed to be reusable, so pull apart carefully to avoid bending the tabs. If the connection feels tight, wiggle the pieces side-to-side instead of pulling straight apart.
- 3. Insert the Extra Road Piece: Align the new road's connectors with the open ends of the existing roadway. Press firmly until you hear a click, ensuring a secure fit. Test the connection by gently tugging on the road—if it comes loose, re-press until it clicks.
- 4. Reconnect the Remaining Roadway: Attach the other end of the new road to the piece you disconnected in step 2. Make sure all connectors are fully engaged. Check that the entire track is level and straight; a slight misalignment can cause marbles to derail.
- 5. Test the Marble Run: Roll a marble along the extended track to verify smooth travel. Watch for any bumps or gaps at the new connections. If the marble stops or jumps, re-check the alignment and connector fit at each joint.
Product Details
- Extra Roads: These extra roads let you extend your Bridge or Bust builds, keeping the roadway going as long as possible for bigger and more ambitious designs. If you frequently hit the length limit of your current track, adding a few extra roads lets you build the longer runs you envision without starting over.
Extra Roads
