I have 19000 miles on my original tires and have only 3/32 of tread left. I got a nail in one of them and none of the tires stores I tried would fix it.

They all want to sell me a new set of tires. So, I fixed it myself with a "Gorilla Grip" tire repair kit from Kragan. Worked fine.

I'm surprised at how fast these tires have worn out. I'm also rather surprised at how few options there are for tires of this size (195/55/R15).
I'm going to need new tires in a few thousand miles anyway. Any recommendations for replacements?