We car seat geeks focus on restraints, but we tend to forget about the true tiresworkhorses of the vehicle: the tires.  While getting the family ride ready to go to the Happiest Place on Earth, dh noticed that the tires were looking a bit worn down along the edges.  I looked at them and yup, all 4 tires were wearing a bit thinner than either of us liked to see on the edges, but the middles still have plenty of tread left in them.  Between the two of us, we couldn’t figure out when or if we had ever replaced the tires; we bought the van new in April 2005, so it’s been 4 years.  That’s a mighty long time to have a first set of tires on a vehicle, but aside from a handful of long trips, I mostly drive it within just a few miles of my home on a daily basis during the school year (in the summers, I’m begging the kids to run errands somewhere, anywhere, just to get out of the house!).  The van still has less than 40K miles on it!