Brick Galaxy – Bike Valve Caps (Star-Wars-inspired)

Custom Bike Valve Stem Caps — “Brick Galaxy” (Star-Wars-inspired)

Bring a little Force to your wheels! These Star-Wars-inspired LEGO-style valve caps snap personality onto your bike in seconds. I modeled a set of 7 mini “heads” and turned them into functional caps so you can mix, match, and squad up your spokes.

What you get

• 7 unique mini head designs (fan-made, brick-style)

Presta and Schrader variants for each head (separate STLs)

• Solid single-color versions + AMS colored versions (link below)

Why they’re cool

• Instant bike flair without adding weight (each cap a few grams)
• Grippy contour for easy on/off with fingers
• Flat bases and clean edges that take paint pens beautifully
• Designed to print fast and sturdy; no fiddly supports on the faces or no supports at all if you're brave enough !

Printing:

• Material: PETG (best for outdoor), ASA/ABS (heat-proof), or PLA+ if you won’t leave the bike in hot sun (Pictured are printed in PLA)
• Nozzle: 0.4 mm
• Layer height: 0.16–0.20 mm for smooth curves
• Walls: 3–4 perimeters
• Top/Bottom: 5–6 layers
• Infill: 20–35% (higher if you want extra thread strength)
• Supports: Off for faces; on (touching buildplate) only if your printer struggles with the internal thread overhang or just off
• Orientation: Print upright with the thread opening down (best strength on the “neck”)

Tip: If threads feel snug on first use, screw the cap on/off a few times to “burnish” the print lines. Don’t force it. It should pop right in.

Post-processing / Color

• Wipe with IPA, then hit details with paint pens or acrylics (eyes, panels, helmets).
• Lock colors with a light matte clear coat (PETG/ASA friendly).
• For two-tone looks, pause at a layer change and swap filament.

Installation & Compatibility

• Thread on finger-tight only; these are dust caps, not torque parts.
• Check wheel clearance (especially on kids’ bikes and tight fenders).

Notes & Safety

For cycling safety, avoid oversized caps on bikes with very tight brake/fender clearances.

Periodically check caps after rides or washing.

Models are fan art made for personal fun: not affiliated with LEGO®, Star Wars™, Disney, or Lucasfilm. Trademarks belong to their owners.

Remix & Customization

Want team colors or your club logo on the back? The flat rear panel is perfect for decals.

If you remix, please credit and share your makes—I’d love to see your squad!