Tire Wear Question

Hello Technistas,

After my first extended roller workout (courtesy of the SoCal rain) I notice that the rear, non-drive side tire needs a shave. That is, the sidewall has sprouted fine fibers. Lots, all the way around. The tire was pumped to 110psi.

At what point do I declare this tire dead as a safety hazard on the road?

Thanks.

Now sounds like a perfect time.

Conti tire?