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Acker has a lot of endurance gravel experience, and he opts for Zipp clip-on aero bars to help relieve pressure on his hands. Matt Acker's Salsa Warbeard. 2018 Gravel Worlds. © Z. Schuster / Cyclocross Magazine

Acker has a lot of endurance gravel experience, and he opts for Zipp clip-on aero bars to help relieve pressure on his hands. Matt Acker’s Salsa Warbeard. 2018 Gravel Worlds. © Z. Schuster / Cyclocross Magazine