Now that we’ve said that, here’s the catch: some of the heavier and later Ford trucks used the five-bolt spindle that have inner bearings with a larger id. The smaller one measures 1.780 inches while the larger one is about 2.25 inches. Both are available from Randy’s Ring and Pinion. Ford gets squirrelly with changes over the years, so we weren’t able to nail the exact applications, but here is a side-by-side comparison of the small inner bearing spindle that we used (left) and the larger inner bearing spindle (right). You need the smaller one for the 5-on-5 1/2 pattern because the 1/2-ton Ford hub uses the smaller inner bearing.