The Shimano GRX FC-RX820-1 left crankset is specifically designed for gravel bikes and features a length of 175 mm along with a matte black finish. This crank is part of Shimano's GRX series, which is tailored to meet the demands of gravel cycling with an optimized chain line and gear compatibility. Made from high-quality aluminum alloy, it offers reliable performance with consistent power transfer at a lightweight of approximately 250 grams. The Hollowtech II construction ensures precise bottom bracket fit and efficient power transfer. Compatible with GRX series chainrings and corresponding bottom bracket standards, this left crankset serves as a replacement part for easy installation for maintenance or customization purposes. The surface treatment provides corrosion resistance and durable wear properties suitable for various riding conditions. It is intended for use with compatible right cranksets and matching chainring configurations to complete the crankset.