From the Loftsmith community

HO five-spoke muscle car rim

Four little five-spoke rims for a slot car or HO scale build that needs a set of wheels. Each one has a lip on both sides to hold a tyre in place, and a centre hole sized for an axle. Tweak the axle hole if your fit runs tight or loose.

4 parts · 0 g · 7 × 7 × 3 mm

Four small grey five-spoke wheel rims in a row, with a thin axle rod through the first
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No adjustable sizes

Ask for the sizes you want to tweak, e.g. “make the width adjustable”.

Change it in the Studio

Parts

  • rim ×4 · PLA · Face up, back flat on the bed

    Print all four at once so each layer gets time to cool

Print settings

Layer height
0.08 mm
Walls
2
Infill
100% (it's basically all wall anyway)
Supports
None
Notes
Slow the outer walls way down (about 20 mm/s), keep the cooling fan at full, and add a brim or print a few extra parts nearby so the layers can cool. A 0.2 mm nozzle gives much crisper spokes.

Assembly

  1. Push each rim onto the axle with the spoke face pointing out. If it's too tight, open the hole with a 1.7 mm drill bit or nudge the Hole fit adjust slider up 0.05 mm and reprint.
  2. Stretch the tire over a lip so it sits on the seat between the two lips.

Good to know

  • At HO scale the spokes and lips have to be thinner than 0.8 mm, so a 0.4 mm nozzle will print them soft and rounded. That's on purpose, because making them thicker would fill in the spokes. For sharp detail, use a 0.2 mm nozzle or a resin printer.
  • The 6.0 mm size is my estimate from a typical 15" rim. Measure the inside of your tires and set the Rim lip diameter slider to match.
  • How tight the hole grips depends on your printer, so print one first and test it on the axle.
I printed this Remix

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