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Brunner opted for the Donnelly PDX mud tread for the Lakewood mud. Eric Brunner's 2019 U23 National Championships Blue Norcross Team Edition. © A. Yee / Cyclocross Magazine

Brunner opted for the Donnelly PDX mud tread for the Lakewood mud. Eric Brunner’s 2019 U23 National Championships Blue Norcross Team Edition. © A. Yee / Cyclocross Magazine