Fast printing PETG filament

[Updated: 5 Aug 2025 Bambu Lab are predicting stock back in towards the end of August.]

In June 2025 Bambu Lab were out of stock of their PETG-HF (High Flow) filament, worldwide. Because of that, I was forced to try other makes. I should point out, that apart from the odd specialist filament, like TPU, I now almost exclusively print using PETG. I mainly print functional parts and they are often for use inside cars, where the heat resistance of PETG is needed to avoid warping.

As mentioned in an earlier article, I wanted to be able to use an alternative filament as a direct replacement for the Bambu Labs version, without the need to change any settings on my Bambu Lab H2D.

I'll start with the benchmark, the Bambu Labs filament:

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Bambu Lab PETG-HF

• Print settings: Automatic defaults.
• Colours tested: Black, Grey, Red and Yellow.
• Print Result: Good. Negligible stringing, few blobs, tidy seams.
• Surface: Satin to matt.
• Spool AMS compatibility: Good (OD 200mm, ID 55mm, Width 67mm)
• Number of kg spools used: >10.
• Print fails: None.
• Eco: Very good, uses refills.
• Cost: ££££

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Filament Choices

The main criteria for selecting the following filaments have been the cost at any point in time, and that they get substantially good reviews on Amazon.

If a spool is on special offer, I have taken advantage of that, as my next filament to try. 

These are in the order I tried them:

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Sunlu Rapid PETG

• Print settings: Same as Bambu Lab PETG-HF.
• Colours tested: Black.
• Print Result: Usually good. Negligible stringing, few blobs. Developed very untidy seams before the nozzle clogged.
• Surface: Satin to matt.
• Spool AMS compatibility: Good. (OD 195mm, ID 63mm, Width 59mm)
• Number of kg spools used: 6.
• Print fails: 1x clogged nozzle.
• Eco: Poor. Reusable plastic spool but no refills available.
• Cost: ££

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Tinmorry Rapid PETG-eco

• Print settings: Same as Bambu Lab PETG-HF.
• Colours tested: Black and Light Grey (too pale).
• Print Result: Usually good. No stringing, few blobs. Usually tidy seams but one spool of light grey was a little ragged.
• Surface: Satin to gloss.
• Spool AMS compatibility: Good (OD 197mm, ID 53mm, Width 56mm)
• Number of kg spools used: >10.
• Print fails: 1x clogged nozzle.
• Eco: Poor. Disposable plastic spool.
• Cost: ££

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Eryone Hyper Speed PETG

• Print settings: Same as Bambu Lab PETG-HF.
• Colours tested: Black and Grey (too dark).
• Print Result: Very Good. No stringing, no blobs, tidy seams.
• Surface: Gloss.
• Spool AMS compatibility: Cardboard spool, not recommended. I use a simple workaround.
• Number of kg spools used: 3.
• Print fails: None.
• Eco: Good. Cardboard spool.
• Cost: ££

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Deeplee Rapid PETG

• Print settings: Same as Bambu Lab PETG-HF.
• Colours tested: Black and Grey.
• Print Result: Good. Negligible stringing, no blobs, tidy seams.
• Surface: Satin to gloss.
• Spool AMS compatibility: Cardboard spool with strengthened edges. I use a simple workaround.
• Number of kg spools used: <1.
• Print fails: None.
• Eco: Good. Cardboard spool.
• Cost: ££

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Subjective Views

The results above are my opinions after a relatively limited number of hours printing with each filament. This is not an organised review or test, this is just a reminder to myself of how well filaments have performed for me.

I have printed everything at Bambu Labs defaults for speed and temperature. I have not attempted to establish the fastest speed a filament can print at. I want to be able to print reliably, repeatably and with minimal tinkering.

My only changes have been to affect the strength appropriate to the component I am printing. Things like wall thicknesses and infill densities.

AMS Compatibility

Being easy to use in the Bambu Lab AMS 2 Pro and AMS HT is important for me. In my results above, I am referring to those two AMS's. I have no access to any other AMS's to try them with.

Cardboard Spools

Cardboard spools are not recommended by Bambu Labs for use in their AMS's. As the cardboard wears on the rollers, the dust formed is not conducive to the operation of the AMS over time. My solution is to use an overlay spool that sandwiches the entire cardboard spool. The running edge is then plastic. As long as the cardboard spool has an overall thickness of 60mm or less and an overall diameter of 200mm or less, the result easily fits in the AMS.

Conclusion

All the filaments that I have tried, so far, are good and can be used as direct alternatives to Bambu Lab PETG-HF.

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This page is updated from time to time when I try new filament.

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