I was needing a pair of 23.1 by 26 combine tires and a farmer nearby has a pair that he says travelled only several hundred feet into the field before the combine gave out permanently. You can tell they are nearly new as they still have some of the thin rubber pieces hanging on them from the tire mold. The problem is on one section of one tire there is a bunch of checking / cracking. Cracks randomly here and there - up to 1/4" deep. Slight width - some up to 1/32". Not on the side wall, but in between the lugs. Maybe covers 12" to 16". Cracks sort of follow an imprint left by the tire mold. Possibly was stored in the sun and this area got the blunt. They are Titan tires. 10 ply. Am I ok to go ahead and buy them since they are 10 ply and the sidewalls are like new??? Just never seen that new of tire get checks. Will use on either a JD 4420 or 6620. Wrong rims - will have to change them to mine. Might get the pair bought for $400. What are they worth???