Just got back from a short 5 day trip and noticed what looks like a rather large staple or nail in one of our tires. I checked tire pressure manually as I do not have a monitoring system as yet. Not knowing when i got the puncture I went back an hour later and pressure has stayed steady. My question is if this tire has to be repaired is it OK to tow with a plug in the tire? Or should I replace it? Tires has about 10k miles on them. Thanks in advance.