leasantry:First off,tractors are of the John Deere,Ford,New Holland,Massey Fergeson,International,Case IH, variety. What you have is a LAWN MOWER. Is it a front tire or rear tire. Front tire is usually held on by a cotter pin. Pull the cotter pin and take it off. Take it to the local tire shop (Newton Discount tire), and get a new one put one. Bout 20 bucks or so. If Mark will fix it when he gets time. If its a real tractor tire, you better have a HI Lift jack handy,and some jack stands. Well,just the same use some jack stands on your lawn mower too. Better safe than sorry.