Should I replace my bicycle tires if they have not been inflated in multiple years A little over 5 years ago I bought a Magna bicycle. Within the first summer of riding it the rear brake fell apart. I finally got around to having he brake fixed this past month but I am worried about the quality of the tires as the bike (which has been hanging in my un-insulated garage for 5 years with many cold winters) has not had the tires inflated in 5 years. I recently checked the PSI on the tires with my gauge and it is 2 PSI. I'm wondering if I should get the tires replaced. I haven't tried putting any air into them as I don't want the tires to pop. Any help is appreciated.
If the bike has been hanging rather than sitting with weight on the tyres (and hence damaging the sidewalls), there is a good chance the tyres are still ok.

You can check the tyres by going around and looking for hairline cracks in the rubber and feeling if the rubber is brittle/flaky.

If they look ok then go ahead and inflate them and recheck the following day.  If they still show no obvious signs of damage then I would go ahead and ride them.