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  • Shimano BB-UN300 Bottom Bracket Sealed Bearing BB Kit

    4 items left

    Shimano BB-UN300 Square Spindle Bottom Brackets, perfect for the Speedline Square Taper Mini Cranks.

    • Fits JIS square-taper cranksets
    • Crankarm fixing bolts sold separately
    • Hollow spindle
    • Spindle Interface Type: Square Taper JIS
    • BB Shell Width (mm): 68mm
    • Bottom Bracket Shell I.D.: 1.37

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