Thank you Swordy... I found PJ DirtGrip here:

http://www.ntwonline.com/acb/showdet...unt=1&DETAIL=1

This seems to be the tire for us:

PJ-31x10.5R16 (10 ply)
Load Range: "E"
Section Width: 10.3
Tread Width: 8.8
Rim Width: 7-9
Outside Diameter: 31.50

This one is bigger, would it fit ????

PJ-33x12.5R16
Load Range: "E"
Section Width: 12.4
Tread Width: 10.4
Rim Width: 8.5-11
Outside Diameter: 33.30

Here's a picture of our front right wheel.

Thanks for everyone's help!

Art