The Shimano FC-RX610-1 crankset offers a balanced combination of weight savings, optimized efficiency, and a range of gearing options to meet the diverse demands of mixed-terrain riding. By pairing a 10-45T or 10-51T cassette with a 38T or 40T chainring, the rider can choose between closer gear ratios or the ultimate range, depending on personal needs. The FC-RX610-1 is available in crank arm lengths of 165, 170, 172.5, and 175 mm, providing an additional opportunity for customization.