Normally we do check, but then I think the problem is the valve as its ok one day and the next, not and the problem started after the last change the other week, came to it and found that the wheel had lost pressure while being idiol for a day or so, its not like its left for months on end, unlike my parents bikes, they just sit in the garbage going NOWHERE and have flat tires as they not been used in so long, but I'll look later in the week when my next day off comes around, I'm not great at changing the wheel, its always a hasle and I take care of my bike for the most part as its my only means of transport from A - B, never got a drivers license and with my job being local, I don't need one and much of what I need is local anyway, thou if I wish, I could take the bus, but they cost money and I have very little reason to go to my nearest city when everything I need is pretty local, aside from TF figures, but that ordering online is about these days as my local Toy shop, isn't that great, but its a small store that apart of what was once a supermarket and since then, its been spilt into five shops/restaurants/Fast food with the Toy shop being the odd one out! For now, tomorow before work, I'll pump my tier back up and hope it stays up for the next couple of days, the last tube problem when it went, was the valve!