Hello,

The pressure of my tires gradually drops from 110PSI to 80PSI every week. I'm not sure if this is normal, as on my MTB, I usually only pumped my tires a couple times a month. Do I need to buy new tubes or tires?

I originally thought it was normal because it is happening to both wheels...and both of them can't be failing...

I simply wish to check with the community.

thanks.