First let me say most IH published tread spacing are from center to center of tire. So if a tire is 13.6 mounted on the recommended rim 13.6 would be added to the published tread spacing. Different rim widths to tires may put the rim edge wider than a tire. Also axles or wheel weights can stick out to increase overall width. Some info I have shows 48 inches as the minimum tread width with wheels dished in for up to a 14.9 tire. Even with 3 different rim bolt on combinations with dished in wheels 48 is the minimum setting. Because they don't recommend having the tire closer than that to the tractor. That would make the inside of tires 48-13.6 = 34.4 and the outside 48+13.6 = 61.6. Sure would hate to operate one like that. Would be hard to get on and off and in mud it would be on the tractor and you. Also would only want to be on smooth level ground. With wheels dished out a 59 inch minimum wheel tread is listed. 59+13.6 = 72.6. outside to outside of tread. 13.6 on 11 inch rims puts you below the 72.6. So in theory a 12.4 on a 10 or 11 inch rim will put you at 72 or less at the minimum tread spacing with the wheels dished out. This is to explain why I question the posters that say 80 some inches outside to outside is all they can be narrowed to. Does someone have a 460 operators manual to make sure it has about the same information?
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