Cool.... Let me know how it goes. My running around changes. I'm in a very rural state, BUT that doesn't mean there are a lot of high speed limit areas... The main highway I run is speed limit 65, but I tend to run 70 to 75 on it to keep up with traffic.

What ones are you leaning towards?

I don't like 225/670/19.5 as I think the tires are too small.

245/70/19.5 would be at least a closer to my stock 20" tires, I lose about 1" total.

Have to look at the overall diameter of the 11R20 and 8R19.5

 

If you have 17" wheels now, I'd go with a Bridgestone Duravis R500, or 250R, both are crazy high mileage tires. 19.5" options, depends how much taller they are compared to what you're running now, and what tread you choose. Same height with more unsprung weight might be countered with an all position smooth tire.

 

I keep looking and dont see any 19.5" options. they look like good tires.
is there a link you have?

Fert