Originally Posted by Sierra_rider

Sounds like they are different then. Only one bearing on the SHI and it's a small one at the end of the spindle, that pretty much just locates/secures the bushing. The pedal body then threads onto the bushing. Even with the small bearing, it develops some axial movement within the bushing, which introduces a bunch of play into the pedal(separate from the worn spindle play.) I remedied this by using a retaining compound to account for the oversized bearing pocket of the bushing.

The bushing, with the small bearing at the end:



Not my picture, just one I found on line...but this is pretty much what my spindles look like after a couple seasons: