Quote Originally Posted by StockEngine View Post
the valve can be easily checked with soap and water...

if its not the valve.. there could be a nail or sharp object embedded on the tire. visit a shop to get a patch
or may bengkong na yung lip ng mags mo like what happened to my mags nung binuhusan ng water with soap yung pito hindi bumula pero nung binuhusan yung lip dun na bumula ng husto dun pala sumisingaw although napaka konti ng singaw the tire loses about 1-2 psi every 4 days, kaya ang ginagawa ko every friday top up ng hangin and then on monday before going to work top up ulet.