I purchased new tires and wheels from a dealer in Butler Pa for my BX23 a few months back. Originally my front tires were 8 inch tires/rims but the new ones for the front came in as 10 inch, which I guess is the route Kubota is going when replacing tires. Once I mounted the front tires I have been in a constant struggle to keep air in the tires. In checking, there is no inner tube available for these 10 inch tires, either from Kubota or anywhere I could find. Since it is over 90 days since I purchased the tires and rims ( I waited a few months before mounting them) the dealer just shrugs his shoulders saying" there is nothing I can do because you went past 90 days." I am not looking for a refund, just a solution but no help at all from the dealer. any suggestions?