Don't need 7- 19.5 wheels ONLY 6. Your OEM spare will be close to the diameter of 19.5 with 225 or 245 70's...the spare is not for rotation but to get you to a tire place. Plus many of us on RVNET have 19.5's and it is reported that there are very few flats or issue with 19.5 on pick ups...so no need to worry about a spare...do the math even at 900 per wheel x 6 =5400. That gets you 150K miles. At 42000 miles per OEM tire you'd have to buy 3.5 sets of OEM tires to equal the miles of 19.5. At 3.5 tire at 300 each x 6 = 6300...there's your 19.5 spare if you wanted one and you'd be even and so much safer...hummm! If you bought only 3 sets of OEM you are even. If you get only 126K (not likely)out of the 19.5 again you are even.
BUT I know this is a useless auguement for folks that are totally against 19.5's.
Have fun be safe!
