Shimano's Ultegra R8000 crankset with 46/36 chain rings is still the best option for a cyclocross double, but it won't work with the GRX front derailleur. - Cyclocross Magazine - Cyclocross and
No cost cutting here. Shimano Ultegra's crankset, with 36/46 chainrings follows Salsa and Raleigh in