Supreme Roof Vent Knob
We keep getting asked about this one — the roof vent knob is one of those Supreme parts that fails long before the rest of the unit is done. We've made this style of part before and can usually print yours without drama.
We keep getting asked about this one — the roof vent knob is one of those Supreme parts that fails long before the rest of the unit is done. We've made this style of part before and can usually print yours without drama.
Why these break
Vent winder knobs split at the shaft. The original was moulded thin to save cents at production volume. That was fine when the plastic was fresh — twenty years on, there's no margin left in it.
How we reproduce them
The process is simple: drop the part in or send clear photos with a ruler in frame, we confirm fit details, and print replacements — often with a little extra material where the original always cracked.
We print these in ASA. ASA is the UV-stable cousin of ABS — it holds its colour and strength through years of Australian sun where the original plastic went chalky and brittle.
Many plastic parts can be recreated, repaired, redesigned, or printed, depending on size, load, heat, material, and available samples. Bring in the damaged part or upload photos for assessment and we'll give you a straight answer before any work starts.
Part details
| Manufacturer | Supreme |
|---|---|
| Vehicle / equipment type | Caravan / pop-top |
| Common failure mode | Vent winder knobs split at the shaft |
| Typical use case | Direct replacement for the original roof vent knob on the Supreme. |
Printing & reverse engineering
| Can print directly | Yes |
|---|---|
| Can scan from broken sample | Yes |
| Can redesign / improve | Yes |
| Recommended material | ASA |
| Alternative materials | ABS |
| Print technology | FDM |
| Difficulty | Easy |
| Estimated print time | 30–60 minutes |
| Estimated cost range | $8 – $20 |
| Expected lifespan | 4–6 years outdoors |
| Outdoor suitable | Yes |
| Heat resistant | No |
| Load bearing | Depends |
| Requires post-processing | No |
Ask us about this part
Many plastic parts can be recreated, repaired, redesigned, or printed, depending on size, load, heat, material, and available samples.
