i've got a rear tire question - i'm new to tractors so with everything i need to research for info - my rear tire size on the tractor is 9.5x24, but from what i can tell original equip is a 8x24 tire? Anyways, when i bought the tractor it had one tire nearly brand new, a Multi-trac L/S rear R1 4 ply. The other is shot and different thread style also. Just having trouble finding a match, and man, these things are expensive! Should i just buy two tires and try to sell my one good one? Any ideas/tips?