Shimano Gives us Two New GRX Chainring Sizes and Two Shorter Crank Arm Choices

Shimano has expanded its GRX gravel component range with the introduction of two new chainring sizes and shorter crank arm options. The new 44-tooth and 46-tooth chainrings complement the existing 40T and 42T options, targeting riders who favour higher speeds on flatter terrain or competitive gravel racing. These larger chainrings also offer the advantage of reduced chain friction, enhancing drivetrain efficiency for gravel cyclists. These chainrings are compatible with current GRX cranksets in both single and double chainring setups, across the 600- and 800-series groups. This compatibility means riders can upgrade their gearing without needing to replace their entire drivetrain, providing a cost-effective way to tailor their bike’s performance. The additions reflect Shimano’s ongoing commitment to offering versatile options that suit a wide range of gravel riding styles and conditions. In addition to the chainrings, Shimano has introduced shorter crank arm lengths of 160mm and 165mm to the RX810 series. The trend towards shorter crank arms is driven by the benefits of a smaller, more efficient pedal stroke, which can support higher cadences and reduce joint strain during extended rides. With these new lengths, the RX810 range now offers crank arms from 160mm to 175mm in 2.5mm increments, allowing riders to fine-tune their bike fit more precisely. These updates provide gravel cyclists with enhanced flexibility in both gearing and bike fit, catering to the diverse demands of the discipline. By expanding the GRX lineup in this way, Shimano continues to support the evolving needs of gravel riders, whether they prioritise speed, comfort, or efficiency. Further details on these new components are available on Shimano’s official website.