Can an Aeron TPU airtube be repaired/patched?

Yes, with self-adhesive patches from AERON, which are available separately. Classic vulcanizing patches for butyl tubes are not compatible with AERON TPU airtubes.

The Aeron TPU airtube has turned yellow after use, why?

Softeners from the rubber of the tire can migrate into the air tube. However, the discoloration is not a sign of a defect or reduced functionality.