Array of options delivers optimal gravel gearing for variety of needs The 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 or 40T chainring, riders can choose closer gear steps or ultimate range depending on personal need. The FC-RX610-1 comes in 165, 170, 172.5, and 175 mm crank arm lengths, providing an additional level of customization. FEATURES Optimal gearing for mixed-terrain riding 10-45T and 10-51T cassette options serve array of riding styles 38T and 40T chainrings available
