Hello! I have a B7300 with 4 dry rotted turf tires. Factory tires were Firestone Turf and Field 20.5x8.00-10's on the front and 29x12.5-15's on the rear. I'm having a very difficult time finding replacements. However, I've zero'd in on the Carlisle Multi Trac C/S 29x12.5-15 as the best possible replacement for the rear. Per Carlisle, it has a RC of 90.2 inches (somewhat larger than the Firestone Turf and Field, which is 86 inches). This means I need to find a front tire that is proportionately larger to match the slightly larger rear. Per my calculations I believe I need something with a RC of approximately 63 inches (as opposed to the Firestone, which is 61). As someone who deals with tires, and who is familiar with Kubotas, can you recommend a front tire? I noted in one thread you recommended the Carlisle USA Trail (20.5x8.00-10). There are four difference USA Trail tires this size. Would any of them work for me? Much thanks for any assistance you can give me! Robert