Oh Ken I know what you mean,I have the same machine. I bought it at home depot I lost count on how many wheels I replaced. The replacement wheels they offer in home depot do not work they are metal cogs,but they don't match the cogs on the mower hents the machine will not even roll.What a shame it's a very good cutter.I think now theres a recall on something. good luck!!
Matt
March 2012