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The 4-arm GX810-2 crankset is Ultegra level and has room for the wide-range 48/31t rings Mueller used. Erica Mueller's Orbea Terra with Shimano GRX. © Z. Schuster / Cyclocross Magazine

The 4-arm GX810-2 crankset is Ultegra level and has room for the wide-range 48/31t rings Mueller used. Erica Mueller’s Orbea Terra with Shimano GRX. © Z. Schuster / Cyclocross Magazine