4104 tires and rims

[RJ]

I am really torn about the tire size but in the end I will probably stay with tires that run 495 rpm, I would love to get an additional 5 - 10 mph so I can run at 1800 @ 65 mph but it will not kill me to run at 55.

Jim -

Just a quick look at a couple of possibilities produced this info.  Not recommending any particular brand here, just showing you what's out there as you do your homework.

Michelin XZE: 12R22.5 = 486 rev/mile   XZE-2: 11R22.5 = 501 rpm   11R24.5 = 476 rpm

Yokohama 104ZR: 11R22.5 = 502 rpm   12R22.5 = 490 rpm

Isn't this fun?? 

FWIW & HTH. . .

[luvrbus]

Just turbo the 6L71 and use a lower rpm tire then haul a** down the road  I really don't think tire size is going to be that big of a factor most of those engines were set around 165 to 170 hp when they were dogs now most are over 200 hp with the setting JMO