My 2006 PW Lexor/ Chev has the LTX MS2 Michelins- Costco. 245 75 16
weight rating: 3042@80psi lbs
these are rated for 70,000 miles ( and that's 20K more than the Goodyear Fortera or Bridgestone Dueler according to Costco website)
right now about $670 for 4 ( that's with $70 off)
I would suggest ( with any tire shop/brand) check the DOT date code- don't let them put old tires on your van- anything older than 6 months is reducing your potential use of the tire.
Tires are really only good for 6 years...if you buy a 1 year old tire...then you get 5 years out of it.
2.) unless you are using your van over the winter, wait until spring then you'll gain another few months of useable tire life.
possible that with oil prices down that tire prices may drop in the future.
if you are using your van- weather is a concern, make sure you have great tires for stopping power & control on poor/slick surfaces.
rotation is important and I rotate at about 5000 miles ( costco does for free!).
If you miss rotations and pile up some miles, do not swap side to side- swap front to rear and rear to front, that way the direction of rotation stays the same. better for the belts if they have "bedded in" to one direction to retain that direction of rotation.
have the shop take the best of your old tires and mount that on your spare- unless your current spare date code is within reason
Mike