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Wells used a non-series Shimano brake caliper with a flat mount adapter and RT900-SS 140mm Centerlock rotors front and rear. Jake Wells' 2018 Nationals-Winning Singlespeed Scott Addict CX. © D. Mable / Cyclocross Magazine

Wells used a non-series Shimano brake caliper with a flat mount adapter and 140mm Dura-Ace RT900-SS IceTech Freeza Centerlock rotors front and rear. Jake Wells’ 2018 Nationals-Winning Singlespeed Scott Addict CX. © D. Mable / Cyclocross Magazine