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Brunner ran a Shimano Ultegra crankset with 46/36t chain rings. Eric Brunner's Blue Norcross SL Cyclocross Bike. © B. Grant / Cyclocross Magazine

Brunner ran a Shimano Ultegra crankset with 46/36t chain rings. Eric Brunner’s Blue Norcross SL Cyclocross Bike. © B. Grant / Cyclocross Magazine