What is making my tire squeak without riding it? I have a Skullbone (HBB) bike. I aired up my tires and now it’s making this squeaking noise when I turn the wheel right to left (not when riding it). I’ve never had this problem before. I aired the tires up to 48 PSI. Can anyone tell me why I’m getting this noise?
This can occur as the rubber compound deteriorates over time.
I personally had this problem this year when I used some MTB tyres that had been unused for 3 years.  Fortunately for me i took it for a ride (being very cautious with grip levels) and when I was done, the squeaking was gone and grip was restored.