My JD1025R has Carlisle Tires. Fronts are 18x8.50 x 10 4 ply turf tires. As the tractor has a front end loader with 4in1 bucket I would like to use 6 ply tires. As they seem to be unobtainable in Australia, has anyone used Kenda K513 tires? The OD of the Carlisles are 18", the Kenda's are 18.5". Will this difference matter with 4wd? Any thoughts welcome.