March 23, 2025
Description
A Little Announcement (Here for a Short Time):
My crowdfunding project Brick berry+ has officially entered the pre-launch phase on Makerworld! You can check it out and follow along here:
https://makerworld.com/zh/crowdfunding/43-brick-berry-a-playable-footwear
There will be a special surprise for followers of this channel when the project goes live—stay tuned!
Disclaimer
The bicycle helmet has undergone and passed the tests related to stability, strength, impact absorption, and field of vision as specified in GB 811-2022 (which is equivalent to EN 1078). The test is sponsored by Makerworld, and the report has been uploaded to this model profile.Â
However, as this helmet is downloadable and individual users can print it with their own choice of filament and printer, neither I nor MakerWorld can guarantee the safety of any individual helmet printed using this file. Printing or using this helmet is at your own personal risk. The testing report is only applicable to helmets printed with the correct filaments and under perfect printing conditions. It serves as a reference for the safety of this design. This project merely demonstrates a design process that extends the capabilities of FFF printing.
Cloudshield is (most likely) the world's first bicycle helmet entirely manufactured using FFF 3D printing technology—from the shell and inner liner to the buckle and strap system—and it passes safety impact tests. Printed with the Bambu Lab H2D, the combination of PETG-CF and TPU-95A extruded by dual print heads ensures a perfect balance of comfort, lightweight design, and durability. The 3D-printed construction distinguishes it from traditional vacuum-formed or injection-molded helmets, while the metallic-finish surface ensures you stand out in any cycling group. The H2D’s die-cutting module allows you to create reflective stickers tailored to the helmet’s curved exterior, enhancing nighttime safety. You can also design custom reflective stickers in the Bambu Lab Suite, then use the H2D to cut and apply them, transforming the helmet into a uniquely personalized product.
Cloudshield is designed for standard adult M-size helmets (head circumference: 57-58 cm). To scale the model according to your head size, uniformly scale all components using the ratio: (Your head circumference ÷ 57)² × 100%. For example, if your head circumference is 61 cm, the scaling ratio would be (61 ÷ 57)² × 100% = 114.53%.
Here's a reference chart:
| Head Circumference example (cm) | Helmet Size (General) | Scaling Ratio |
| 51cm | XS | 80.06% |
| 55cm | S | 93.09% |
| 57cm | M | 100% |
| 60cm | L | 110.80% |
| 63cm | XL | 122.05% |
It is recommended to use BambuLab PETG-CF and TPU-95A HF to achieve a balance between printing speed and product performance. If you also have TPU-90A, you may use it alongside PETG-CF to print the straps separately, which will simplify the assembly of the straps to the helmet.
Tips: When printing with the BambuLab H2D extruder, ensure the left extruder is used for PETG-CF and the right extruder for TPU-95A HF (consistent with the print configurations I provided).
If you printed both the helmet and straps using only PETG-CF and TPU-95A HF (without additional TPU-90A for straps), all parts can be printed together on Plate 1.
Attach the strap labeled "L" to the mounting slot on the left ear-like structure of the helmet, and the strap labeled "R" to the right side. Align the starting end of the strap with the slot and firmly snap it into place. This design is rigorously tested and secure—no adhesive is required. To replace a strap, reverse the steps to remove the old one.
After attaching the straps to the helmet, connect and lock the straps to the buckle as shown in the diagram below.
Alternatively, if you prefer fabric straps, Plate 2 includes spare mounting slot parts (without TPU straps) for customization.
The bicycle helmet has undergone and passed the tests related to stability, strength, impact absorption, and field of vision as specified in GB 811-2022 (which is equivalent to EN 1078). The test is sponsored by Makerworld, and the report has been uploaded to this model profile.Â
Disclaimer: The testing was conducted only on the uploaded print configuration, print with bambulab PETG-CF and TPU 95A HF. Using different materials or modifying the print settings may compromise the helmet's performance.
Some photos of the testing process:
License:
Standard Digital File License
CloudBerry
