TPU 85A / 90A Print Settings
Expert-recommended TPU 85A / 90A (TPU) settings for all Bambu Lab printers
Why use TPU 85A / 90A?
- Softer than 95A — Shore 85A/90A provides rubber-like flexibility
- Ideal for soft-touch grips, flexible hinges, and wearable accessories
- Excellent for seals, vibration dampening, and shock absorption
- Can create living hinges and deformable structures
- Unique among 3D printing materials for true rubber-like feel
What are the best TPU 85A / 90A print settings?
Use default Bambu Lab temperature profiles for TPU 85A / 90A. Recommended outer wall speed is 50 mm/s.
| Setting | Value | Note |
|---|---|---|
| speed.layers.outerWall | 50 | Very slow — soft TPU is extremely prone to buckling |
| speed.layers.innerWall | 60 | Very slow inner walls |
| speed.layers.sparseInfill | 80 | Extremely slow infill for soft TPU |
| speed.layers.internalSolidInfill | 60 | Slow solid infill |
| speed.layers.topSurface | 50 | Very slow top surface |
| speed.initial.layer | 20 | Extremely slow first layer |
| speed.initial.infill | 30 | Very slow initial infill |
| speed.travel | 400 | Low travel speed to minimize oozing |
| speed.layers.bridge | 15 | Minimal bridge speed |
| speed.layers.gapInfill | 50 | Very slow gap infill |
| speed.accel.normalPrinting | 2000 | Very low acceleration for soft TPU |
| speed.accel.outerWall | 1500 | Minimal acceleration |
| strength.walls.wallLoops | 3 | More walls for soft TPU parts |
| strength.infill.density | 15 | Lower infill for more flex |
| strength.infill.pattern | Gyroid | Gyroid for isotropic flexibility |
| quality.advanced.avoidCrossingWall | true | Prevents stringing |
| support.enable | false | Supports nearly impossible to remove from soft TPU |
What nozzle size should I use for TPU 85A / 90A?
0.4mm — soft TPU is very challenging at fine resolution
0.4mm nozzle — print VERY slowly
0.6mm recommended — easier flow for soft TPU
How do I dry TPU 85A / 90A filament?
Dry TPU 85A / 90A at 55°C for 4-6 hours. Moderate — dry if popping/bubbling occurs
What support material should I use with TPU 85A / 90A?
Recommended: Avoid supports entirely — design parts to be support-free
Soft TPU 85A supports are nearly impossible to remove without damaging the part.
Expert Tips for TPU 85A / 90A
- TPU 85A is significantly harder to print than 95A — expect a learning curve.
- Direct drive extruders (H2D) are virtually required. Bowden setups will struggle.
- Completely disable retraction if experiencing jams.
- Print on a clean, non-textured build plate for easy removal.
Which Bambu Lab printers work with TPU 85A / 90A?
Alternatives to TPU 85A / 90A
If you want easier printing with good flexibility (less rubber-like but more reliable)
Trade-offs: Firmer feel — not as soft or rubber-like. Less compression
If the part doesn't actually need flexibility and you want the easiest print possible
Trade-offs: Completely rigid — no flex at all. Will crack instead of bending
Get your full TPU 85A / 90A profile
Use Print Advisor to generate a complete Bambu Studio-compatible JSON profile for TPU 85A / 90A, customized to your priorities and printer.
Open Print Advisor