Tire sounds and feels flat but it's not

[SaveTheClockTower]

My rear tire sounds flat when I'm riding and feels flat when I'm going around a corner but it is not flat. The tread is still good. What could cause this?

[Bill]

Hey there, nice to see your posts again. Making a guess would be to check the tire pressure?

[DrHenley]

Could be your spokes are too loose. That can give you a mushy feel, especially when cornering.

[Jordan300]

True and True. I'd do it in that order as well, first tire pressure then spoke tension.