Real tire  overall diameter - 1603mm
Real tire  overall width    -  600mm 
Real wheel overall diameter -  830mm

LEGO solution
tire  overall diameter - 94,3mm
tire  overall width    - 44mm 
wheel overall diameter - 49mm

In order to achieve 94,5mm overall diameter from 94,8 X 44R Baloon tire on
wheel from 8448 set and container block 9 x 9 x 1 on outer side to make
wheel with zero offset. 



parts list:
1 x http://www.bricklink.com/catalogItem.asp?P=54120
1 x http://www.bricklink.com/catalogItem.asp?P=47676
1 x http://www.bricklink.com/catalogItem.asp?P=32197



for any commants, questions please contact me at
ipsaDOTigorATgmailDOTcom