Tire suggestions help

[Thorsteenster]

So far I'm looking at this tire:
http://www.afv-model.com/4711shop/product_info.php?info=p1209_Michelin-14-R-20-XL-Hollow-tire.html
They also have it in solid:
http://www.afv-model.com/4711shop/product_info.php?info=p1053_Michelin-14-R-20-XL-Full-tire.html
Is load rating the only difference/reason for choosing one over the other?

For this build:
http://rctruckandconstruction.com/showthread.php?t=352

Being a medium duty truck, I want a tire that looks appropriately sized 1:14 (close to anyway), but it'll be 4WD so I also want an aggressive/off road tread, but not really a semi type tread as that wouldn't look very good on a medium duty truck.

The tire above would be about a 40" tire on a 19" rim, a little big but may look fine?

I'll need to get wheels made for this, and get the tires to do so, as well before I can narrow the body so I'm looking for some input on this.

Any suggestions or thoughts on other tires in 2.5" to 3" height range or on how the above tires will look post up please.

Thanks!

[Thorsteenster]

Eh, forget it, thanks for all your help!

I went another direction with something readily available domestically, and for the same price as just the tires from AFV I got tires and wheels for both truck and trailer.
Not as scale looking, but nice cost effective solution.