So I think the bearings on my FC-M 582 crankset are shot. I've been over the install of them and they still make a god awful noise. I swapped in my old square taper crankset and BAM, no more noise. Lil info..

I'm a big dude, 275# riding a steel SS. The LX crankset uses those plastic spacers. Is it possible that i'm putting enough force down to deform the plastic spacers on the down pedal?

Do they make a metal spacer replcement? And if I need to replace the bearings, are the XT/XTR bearings compatible with my LX crankset?