Tire is lossing air

[prjia]

One tire's pressure drops 1 PSI in two days. Can anyone tell me how to deal with this problem? How to check to see if there a hole on the tire or the tire is "慢撒气" ? Where is the cheapest place to fix it? Thanks.

 

[wpger]

You can check tire yourself to see if there's any damage, it is easy. If no obvious evidence, then it is most possibly the air is leaking through tire valve. This happens oftenly to older tires. Change tire valve is a simple job, you can take to any tire shop. <$20 I guess.