When selecting carbon fiber tubes for lightweight structures, the Φ20mm outer diameter is a popular choice. It offers an excellent balance of strength, stiffness, and weight, making it ideal for drone arms, robotic linkages, and sports equipment frames.
What I appreciate about GBTECH’s Φ20 tubes is the combination of high specific strength and the option for customization—different wall thicknesses, surface weaves (1K/3K), and CNC end-finishing are available. This saves secondary processing time.
If you’re designing for weight-critical applications, this size is worth considering.