Genetic Chainring Bolt Set MFPN=442020003 Open and aggressive tread for

Open and aggressive tread for excellent grip and self-cleaning Flat Protection Tread and Sidewall Color Black Defined Color Black ISO Width (mm) 61 ISO Diameter 584 / 650b / 27

}Shimano GRX FC-RX610-2 Crankset - 170mm 12-Speed 46/30t 110/80 BCD Hollowtech II Spindle Interface Black

Works well standard saddle rails or just toss it into a jersey pocket

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Genetic Chainring Bolt Set MFPN=442020003 Open and aggressive tread forHigh quality CrMo steel Chrome plated Set of 5 Model CrMo Chainring Bolts Kit Double, Single Size 8x6. 5mm, 8x8. 5mm Material CrMo Color Chrome