I need new treads on the Burban. Currently I have 285/75R16 BFG AT KO's on the burb..they are load range D I believe. It is a 2500 model and came w/ D rated tires..originally had 245's on it. I want to go smaller b/c my truck has 3.73 gears and sucks balls when I tow w/ it. The 454 tows fine but you have to be going 80 mph plus to get in the power band. W/ the 285's I run 2000 RPM at 74 mph...and it lugs down on every hill. If i put in third 65 mph is around 2700 rpm and then turning to many RPMs and the converter seems to unlock lock too much.
The spare wheel and tire is a centerline rim like the other 4 but has a 265/75R16 Michelin LTX AT on it.
So plan was (me being the joo that I am) to get rid of the centerlines and run some 2004 Chevy HD wheels that I have mount the spare tire on one of them and buy 3 other matching Michelins. Problem is that the spare is a load range C and that's all that can be had in AT's in Michelins. You can get regular LTX's but no AT's in D range in 265's. Think I'll need D's? The heavest thing I tow is the Range Rover and the boat. What do ya'll think?