Hi , I just acquired a Sears 15.5 hp 42 inch cut rider model number 917.259540, Its used and has had a different transaxel put under it and the tires in the rear is a size to small I think. They are 16 x 9 , what is the correct size if someone can help. The deck sets almost on the ground on the highest mowing level. Thanks & God Bless.
