Time for tires on my 2005 Chevy BT Cruiser. Came with Uniroyal Laredo 225/75 16 Load Range "D". But D's are getting kinda scarce (limited choices). This rig rides and handles great and I don't want to spoil it. After only 5 years, Uniroyal sidewalls are cracked beyond safe. I bought it used, so I don't know how they were cared for (covered, pressure, etc.) I'm sure E's will not hurt the handling (will probably help), but I'm concerned about the ride. It's only a 21 footer, with a max of less than 7000 lbs on the duals fully loaded and 3000+ on the front. Has anyone gone from D to E? If so, was there a noticable difference in the ride? I'm also undecided on brand. Looking at Firestone Transforce, among others. Hope I'm not opening a pandora's box here! Two tire dealers told me Uniroyal and Michelin are the worst for cracking...!?! I had always been a Michelin fan.