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Shimano square interior bearing BB-UN300 axle length 122 mm, 68 mm BSA for chain box 4550170619145 | eBay
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Amazon.com : Mimoke Square Tapered Bottom Bracket BSA Innenlager Bearing 68mm x 113mm 116mm 118mm 122.5mm 124mm 126mm (110.5) : Sports & Outdoors
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