一天后轮胎气压降低２ psi ，轮胎是不是有问题 (更新)

上周五打足气到 ３１ psi，一直没开过， 今天用自动打气机（可以设定气压的那种）再次打气，起始气压好象是２８psi。看来轮胎问题不大（今天天气比较凉快，可能是个原因）。

有个疑问，上星期发现问题的时候，轮胎气压好像１８psi左右，是因为新轮胎装上的时候就一直没有打足过气？（半年前新换的轮胎，也一直没有测过气压）

thanks again for your time and any input

 

(原帖)最近一直在家工作，前天偶然发现一个轮胎看起来气不足，量了一下，大概１８psi，打足气到３１psi，今天再查下大概是２８psi，轮胎是新换的，是不是轮胎在漏气？现在疫情，去shop检查比较麻烦，是请他们来上门pickup;

所有跟帖： 

• also using soap spray, no found leaking on valve and exterior li -michaelusa2- ♂ (76 bytes) () 09/10/2021 postreply 11:24:46

• correct, just having 30 min driving on last weekend after put 31 -michaelusa2- ♂ (79 bytes) () 09/10/2021 postreply 11:35:07

• 28PSI 太低了， 那18PSI的车， 你的TPM没亮？ -总要注册- ♂ (0 bytes) () 09/10/2021 postreply 11:42:06

• old car, no tire pressure warning -michaelusa2- ♂ (0 bytes) () 09/10/2021 postreply 11:51:22

• the spec is 31 psi on rear tire, -michaelusa2- ♂ (0 bytes) () 09/10/2021 postreply 11:52:06

• It is possible there is a rim leak. But you need to -jassco- ♂ (260 bytes) () 09/10/2021 postreply 12:37:01

• got it, will do, thanks -michaelusa2- ♂ (0 bytes) () 09/10/2021 postreply 13:12:30

• 你会卸轮胎吗？如果会，卸下来放在澡盆里加水一看就知道了。 -我胡说八道- ♂ (74 bytes) () 09/10/2021 postreply 15:08:53

• I will let shop to handle it -michaelusa2- ♂ (0 bytes) () 09/10/2021 postreply 16:28:22

• going to buy/install external TMP on tire valve, something like -michaelusa2- ♂ (748 bytes) () 09/11/2021 postreply 06:26:51

• found good one, cigarette lighter plug, so minimize shield view -michaelusa2- ♂ (1504 bytes) () 09/11/2021 postreply 12:35:09

• 你以前也发同样我问题？清晨量。2psi不是事。 -chinomango- ♂ (0 bytes) () 09/12/2021 postreply 20:37:42

• yes, seems minor issue, will install external TPM on valve -michaelusa2- ♂ (0 bytes) () 09/13/2021 postreply 06:40:30