It was always a challenge for us to find the right tires or right sizes needed for all our machines, but not anymore we found this site that is actually a tire manufacture for many OEM karting manufactures and they warehouse and distribute replacement tires at do incredible prices. They had in stock tires for our karts, Atv, and even my lawn mower. You have to check them out.
Www.gpsoffroadproducts.com A friend of mine just purchased a set of tires for his John Deere gator called run flats from them and said the tires are by far the most durable tires he has ever seen. He said there is a video on their website that is a must see that I haven't gotten a chance to go check out until now and it is
the tire can be that durable.