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Brunner ran a double with an Ultegra R8000 crankset that held 46/36t cyclocross chain rings. Eric Brunner's 2019 U23 National Championships Blue Norcross Team Edition. © A. Yee / Cyclocross Magazine

Brunner ran a double with an Ultegra R8000 crankset that held 46/36t cyclocross chain rings. Eric Brunner’s 2019 U23 National Championships Blue Norcross Team Edition. © A. Yee / Cyclocross Magazine