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hippy
Odd. Fulcrum with that preload ring tend to have cartridge bearings, and they disassemble easily enough (usually: use cone spanners on lock nuts, remove preload nut, remove cone/nut with a bearing seat, whack the axle out with a mallet). Keep the old bearings and use them to press in the new bearings, just don’t forget to reinsert axle if it’s a stepped axle fitted between the bearings.