Depends on what else your doing with the tractor. The tri rib was all there was years ago, but then all farming was done in plowing disking chiseling etc. You need a tri rib in deep soft loose dirt to get enough grab to make a sharp headland turn. Nowdays everything is no till and the ground is firm. A five rib may be fine for that kind of farming. Most tractors of the past generation are too small for the field and are finding a second career as a loader tractor and changing to a four or five rib is fine for most loader situations. On hard ground, all the tractor/loader/material weight rides on the center rib on a tri rib which isn't what it was designed for.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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