I have the tractor listed above and am having a difficult time finding new tires. I currently have turf tires and would like to stay with those. What do you guys do for tires? The current tires are 212/80-D15 and the rears are 355/80-D20. I have seen that these sizes have been updated to 27.5x8.4-15 and 41x14-20 but could really verify that. Thanks for any help. - Jim