– 68/73mm English (BC1.37 x 24tpi – RH/LH). Compatible with IRD retrofit cups (sold separately), RD-419
– Traditional square JIS 2-degree taper crank-arm interface
– 68/73mm English (BC1.37 x 24tpi – RH/LH). Compatible with IRD retrofit cups (sold separately), RD-419
– 68/73mm English (BC1.37 x 24tpi – RH/LH). Compatible with IRD retrofit cups (sold separately), RD-419
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