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Shimano FC-RX610 GRX Single 12-Speed Chainset - 172.5mm40T
ShimanoThe SHIMANO FC-RX610-1 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding. By pairing a 10-45T or 10-51T cassette with 38T and 40T chainring, riders to choose closer gear steps or ultimate range depending on personal need. The FC-RX610-1 comes in 165, 170, 172.5, and 175mm crank arm lengths, adding an additional level of customization.