Just wanting to change out the front tires on one of the Scag TT's (2003). They are the 13x6.50x6 smooth tires. I thought that Walmart would be able to do it because they changed the rear 24x12x12 tires but, they said the changing machine would only go down to 8" tires. Is there someplace else nationally that can do it or is it just break them down by hand ? Thanks.