I have an old Giant road bike with SORA components and the bottom bracket says BC 1.37x47 Road LK on the non-drive side and BC 1.37x24 Road LK on the drive side.
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Shimano Bottom Bracket BB-RS500 English Threaded 68 mm BC 1.37x24 Road A20 | eBay
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Shimano Bottom Bracket BB-RS500 English Threaded 68 mm BC 1.37x24 Road A20 | eBay
