ELEGOO Rapid PETG Review

I’d try Elegoo Rapid PETG if you print containers, organizers or prototype cases and want to finish them sooner. Its appeal is faster printing with PETG, a plastic commonly used for practical parts. The catch is that you may need to dry the filament and tune your settings before that speed produces a part you’re happy with.

Elegoo sells Rapid PETG as 1.75 mm-diameter filament, the plastic strand fed into your printer, with 1 kg of material on each cardboard spool. PETG Pro is its nearby alternative.

I’d start with one spool for repeat jobs where setup time can pay off. I’d be less tempted if your current PETG already prints those parts reliably, or you expect perfect surfaces without changing the default profile—the preset print settings.

How Fast Can You Print With Rapid PETG?

Elegoo advertises printing speeds up to 600 mm/s. That describes how quickly the nozzle moves while printing; it doesn’t tell you how long a whole model takes or how it looks afterward.

A more useful setting is maximum volumetric speed: the limit on how much plastic the printer is asked to push through its nozzle each second, measured in mm³/s. It needs to match what your printer can melt and deliver reliably. Wider lines and thicker layers need more plastic at the same movement speed.

Your slicer, the software that prepares models for printing, also slows down for cooling, overhangs and other limits. Overhangs are areas that extend beyond the layer below. A higher speed setting may therefore make little difference to the finish time.

One owner printed a 250 mm-tall container body in gray Rapid PETG on a Bambu Lab X1C. It used 503 g of filament and took 9 hours 50 minutes. The calibrated profile predicted 9 hours 46 minutes; the generic PETG profile predicted 12 hours 27 minutes.

That’s encouraging for a substantial print, but the generic-profile figure was an estimate, not a second completed print. It doesn’t establish a measured percentage improvement. The top and bottom were separate jobs, too.

A separate owner report describes printing up to 250 mm/s on a Neptune 4 Plus. That isn’t proof of clean prints at 600 mm/s across different machines or shapes.

For your own comparison, print the same part with your usual settings and a tuned Rapid PETG profile. Keep the nozzle, layer height, walls and internal fill equivalent. Record actual duration and compare the finished parts. You’re more likely to save time on long, simple walls than on a tiny model that keeps slowing down for detail.

What To Expect From Rapid PETG’s Finish

Rapid PETG looks promising for everyday utility parts, but a fast container print doesn’t settle whether you’ll like it for a visible case or a lid that must fit neatly.

The X1C container owner reported one rough line on the outside, near small overhangs above arches, while the inside looked fine. That doesn’t establish speed as the cause.

Don’t count on one consistent level of shine, either. A P1S owner using black Rapid PETG reported no shift to a matte appearance during a 90–200 mm/s surface test at 255°C, with 0.16 mm layers and 0.42 mm-wide lines.

Separately, white Rapid PETG printed on an Engineering plate was described as not shiny. Those are different colors and conditions, not conflicting measurements of an identical sample.

Stringing means fine threads of plastic left between separate features. PETG can need adjustments to temperature and retraction—the brief pullback of filament before the nozzle moves—to reduce them. Drying removes absorbed moisture that can spoil the surface, so it belongs in that process, too.

For closely fitting parts, inspect the actual fit rather than judging only by appearance. Check that the bottom sits flat and the lid closes without force. A curled corner is warping; a smoother wall won’t compensate for it.

If visible walls look rough, try slowing those walls before slowing the entire print. That lets you see whether a slower speed helps the finish while keeping faster settings elsewhere.

Getting Rapid PETG Ready For Your Printer

Your printer needs to accept 1.75 mm filament and support PETG printing temperatures and a heated bed. The material doesn’t require an Elegoo printer, but the filament profile must match your machine and nozzle.

Temperature guidance needs care. Elegoo’s global product page lists a 220–250°C nozzle range and a 75–90°C bed range. Some spool labels have given a different range: the X1C owner reported 230–260°C for the nozzle.

Start with the instructions on your actual spool, within your printer’s limits. If those instructions conflict with your printer’s profile, confirm the appropriate range with Elegoo before raising temperatures. These differences don’t, by themselves, prove that the formula changed.

Elegoo’s US product page explicitly says to dry Rapid PETG at 60°C for eight hours before use. Use a filament dryer that supports that setting, then keep the spool sealed with desiccant, the moisture-absorbing material supplied in little packets. A successful print straight from a new bag doesn’t establish that drying is unnecessary.

Begin with a temperature test within the applicable range. Use your slicer’s calibration tools to find a maximum volumetric speed that doesn’t leave the printer delivering too little plastic at higher speeds.

Pressure advance adjusts plastic delivery as the printer changes speed, helping it print cleaner corners. Flow ratio adjusts the amount dispensed: too little can leave gaps; too much can leave rough surfaces and inaccurate dimensions. Test retraction if strings remain, and follow your slicer’s calibration sequence so you’re not changing everything together.

Default-profile failures and calibrated successes both appear in owner reports. An X1C result isn’t a ready-made A1 profile: nozzle size, cooling, build plate and layer height all matter. Follow your plate maker’s PETG instructions, including any glue requirement for easier release.

Check the spool separately from the filament. For the original enclosed Bambu AMS automatic feeder, Bambu recommends adapters for cardboard spools to reduce slipping and debris; Elegoo also supplies a printable ring design. Verify that the adapted spool fits and rotates freely. Don’t assume a ring intended for an enclosed AMS solves compatibility with an AMS lite or another feeder.

How Rapid PETG Compares With PETG Pro

PETG Pro is the closest alternative if you want to stay with Elegoo. Both remain in its US range, and equivalent single-spool listings put them in a similar price bracket. Don’t read “Pro” as a guarantee of stronger parts, or assume Rapid gives up strength to print faster.

A reported comparison using a Bambu Lab P1P and AMS, with temperature calibrated for each material, favored Rapid in tensile and layer-bonding tests. Those test how hard a sample is to pull apart and how well its printed layers hold together.

Without the original measurements, drying conditions and repeated tests, you can’t tell how widely that result applies. It challenges the assumption that Pro is stronger; it doesn’t make Rapid the stronger choice for every part.

That comparison also reported less moisture sensitivity and stringing with Pro. Without a documented comparison of drying and moisture exposure, that is a reason to consider a trial spool, not a promise of easier printing.

Elegoo gives the same 60°C, eight-hour drying instruction for Pro. Switching variants doesn’t remove moisture management from your routine.

The Pro spool in that comparison had closed cardboard edges. Packaging can vary, so check the spool supplied rather than choosing Pro solely for feeder compatibility. Closed edges don’t guarantee that a spool will fit or feed properly.

I’d choose Rapid first if you want to finish prints sooner. I’d consider Pro if you want to compare stringing on the same model after drying both spools. Neither name tells you whether the material suits a heavily loaded part or sustained heat. For those jobs, you need evidence that matches the load, temperature and way the part is printed.

Is Rapid PETG Worth Buying For Your Prints?

Buy a trial spool if you regularly make practical PETG parts, have room to improve print time, and are willing to do the initial tuning. It’s especially interesting for larger jobs, provided your own timing shows an improvement at the quality you need.

Stay with a PETG you already trust if it finishes your work quickly enough and gives you the fit and finish you need. A faster label alone isn’t a reason to replace a working setup.

Before buying a bundle, print one representative part in the color you intend to use. Include the time you spend removing strings, fixing fit problems or reprinting failures when deciding whether the change helped.