Originally Posted by
onehundred80
If memory serves me well then the largest inside diameter is the U/Cut at the shoulder the bearing sits against.
I have all the sizes somewhere, pulley diameter was a huge topic here once. The aluminum ones were a waste of money as where the early steel ones.
If any pulley can be trusted it is the OEM ones.
I’ll see if I can find the figures, the use of a smaller bearing is preferable to the OEM diameter.
Your memory is correct about the minimum internal diameter. In fact, the aluminum aftermarket one split right at that shoulder, which coincides with the root of one of the grooves. By the way, I cut the new grooves in this one with a rounded bottom to reduce the stresses in that area.