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Shimano BB-UN55 bottom bracket British thread 68 - 122.5 mm View larger

Shimano BB-UN300 bottom bracket British thread 68 - 122.5 mm



A good quality and value Shimano 68/122.5 bottom bracket for traditional chainsets (note picture shows 113)

Square taper JIS

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BB-UN300 bottom bracket British thread, 68 - 122.5 mm (LL123)

This Shimano square taper bottom bracket uses super-accurate bearings for smooth operation and improved durability

122.5mm for 68mm bottom bracket shell, durable, hard-wearing sealed cartridge bottom bracket with square tapered spindle fitting

Lightweight hollow spindle

Maintenance-free sealed cartridge bearing assembly keeps out dirt, mud, and water for long bearing life Fast and easy installation without adjustment

Narrow body allows clearance for cable routing under the bottom bracket

Shimano code: BB-UN55 now BBUN300B23

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Data sheet

Bottom Bracket Shell Size68mm