Light, lighter, ultra-light!
I always wanted to test the material of plastic bottles (PETG) as resonance tubes. I have long searched for suitable material in the appropriate diameter grading.
Unfortunately, it is always the case that you have to buy a certain minimum quantitie per diameter. Since I finance all my handicrafts with my private money, I limited the test to only two diameters, but there are also suitable gradings for the tube-in-tube-concept with better fitting to the bar sizes.
The V5 frame with aluminum tubes weighs 20.3 kg, with PVC pipes 19.5 kg and with the PETG pipes only 15.7 kg.
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