How long do latex tubes last? So they are probably more than a year old from my purchase date. As an example, I recently changed both the front and rear tubes less than a week ago. I noticed last night that the pressure in the rear tire was lower than I would normally expect. I air my tires up before every ride and I generally have a rough idea of how much pressure I should see prior to airing up the tires. So the rear was a little lower than I had expected but certainly not flat.