I noticed this hole when I got to work in the morning. It lets out enough air that I can hear it when I try to inflate the tire. What are my options here, aside from buying and mounting a new tire? Is this fixable with liquid sealant? A rubber rope kit?
I'm not taking this bike past 90mph, so any fix doesn't need to be capable of withstanding incredibly high stress. But I don't want to be unsafe, either. Thanks for the help.
You have good answers in the thread and probably have decided on your solution. Let's talk about the future, too.
I've been using mushroom style plugs for well over a decade and surely have tens of thousands of miles on plugged tires. Maybe some would consider my attitude on the subject ummm, cavalier. Every tire I've "repaired" in this way was a clearly screw/nail/round puncture. Yours looks scary to me. Find the budget and get a new tire.
Also get a plug kit for future just-in-case. They work, even if you don't care to use a holed tire until the end of it's life, a plug can get you back to a place where the tire can be replaced, just treat it like a doughnut spare for a car and go gently.