I just purchased a JD260. The front tires have no tread and one sidewall has a large slice in it so I don't think it can be recapped (can it?). the rear tires look new. They are all Solideal tires. Can I replace just the front 2? Do in need to buy Solideal tires or can I use any tire with the same circumference? I don't really need solid tires. I will only use the machine at my site and flat tires are not a problem.