BC-73 Square Taper BB

Sealed cartridge bearings Boron steel spindle Phosphated cups Anodized aluminum sheath Thread spec: BC1.37” x 24T 280 grams JIS taper (fits modern cranks- not compatible with classic European cranks) Available in the following sizes:  68mm shell by: 107mm, 110.5mm, 113mm, 118mm, 122.5mm, 127.5mm 73mm shell by: 110.5mm, 113mm, 118mm, 122.5mm  

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