My 2008 Kubota 900 has a set of 25-10-12 tires that are original. Are they compatible with a set (4) of 24-9-12's for replacement purposes??? I appreciate the help! Thanks.
25-10-12 is OEM size. Given the size and weight of an RTV, there would be no way I'd go smaller on the tires. You also have to be concerned with the ply number due to the RTV's weight as well.
When I got rid of my Craptyle RTV tires, I went to the ITP Blackwater 6 (or 8) ply tires in size 26-11-12, one size bigger.