darksky
Member
- Region
- USA
Wife's new bike hasn't yet been ridden as she recovers from a medical issue. I checked the tires recently and found the rear tire nearly flat. Pumped to up to 40 psi and checked it in a few days, down to about 20 psi. Aired it up again to 40 psi, after five days still at 40 psi. Is it a problem (maybe intermittent) with the valve core? Any opinions and advice appreciated.