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Oversize Big Steel bearings to fit Trek's own BB90 (road) & BB95 (mountain) internal bottom brackets with Shimano HT2 cranks. These bearings have a slightly oversize (0.1 mm) OD (external diameter) to fit damaged frames.
Shields are included to protect the bearings from direct contaminant entry.
Kit contains two oversize Enduro chromium steel caged deep groove ball bearings and one pair of Enduro 281820 orange silicone spacer shields.
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