4-5mm Dyneema Cord Pulley using 608Z Bearing

I made this new bearing pulley to experiment with string powered propulsion and suspension adjustment on my development of Solar Muscle Electric Vehicles (SMEV).
I am using 4mm Dyneema cord with 1300dN design strength. I am not sure how continuous load and high pressure will effect the PETG printed pulleys. Worst case I may have to upgrade to nylon or have these turned out of aluminum...
Using multiple block and tackle like pulleys the force will be distributed on multiple strings and hopefull