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The TCX's top tube flattens out from front to rear, away from the head tube. Emily Cameron's Collegiate Club Women-winning Giant TCX cyclocross bike. 2019 USA Cycling Cyclocross National Championships bike profiles, Lakewood, WA. Photo: © A. Yee / Cyclocross Magazine

The TCX’s top tube flattens out from front to rear, away from the head tube. Emily Cameron’s Collegiate Club Women-winning Giant TCX cyclocross bike. 2019 USA Cycling Cyclocross National Championships bike profiles, Lakewood, WA. Photo: © A. Yee / Cyclocross Magazine