winterhound 
2009 Toyota Highlander SUV Sport 4dr SUV AWD (3.5L 6cyl 5A)
Tire change made a big difference
 Too early to say much, just got the car.  However, after reading very bad reviews on the OEM tires (Bridgestone Dueler 400 H/L, I ended trading them in on a new set of Brigestgone Dueler Allenza's 255/55/19's (one size larger).  WOW! Cleaned up the mushiness; they feel way more tuned to the suspension (at 42 lbs); and the more stable stance at high speed (80 MPH) is a drastic improvement.  The Tire Rack rating is way better, and I need this car to perform in snow. The increased diameter is minimal (maybe .4 inch) while the extra width is part of the much improved feel (perhaps 1.5 inches).  