Seido T47 Adapter Bottom Bracket Adaptors Spindle Diameter:24Mm Replacement extension tower for Zipp

Replacement extension tower for Zipp aerobars

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Seido T47 Adapter Bottom Bracket Adaptors Spindle Diameter:24Mm Replacement extension tower for ZippMade to adapt common crank sizes to the T47 Bottom Brackets Available for 24, 24 22 or 29mm spindle sizes TECH SPECS BB Shell Type T47 Crank Spindle Diameter 24mm