Mark Threlfall's Presenter Pro Bike With SRAM Aero HRD Disc Brakes - YouTube
SRAM Road on Twitter: "Visit our booth at #ChallengeRoth and see the new SRAM S-900 Aero HRD brakes on this incredible @Diamondbackbike! #eTap https://t.co/jx5Bj0hJWR" / Twitter