The motor-paced cycling land speed record is both an eccentric mark and true combined effort. Trust is critical. In the record-setting run, Holbrook towed Mueller-Korenek close to the two-mile mark of the five-mile salt flats course, hitting a speed around 150 mph. Then Mueller-Korenek released her cable tether, pedaling the final three miles on her own power, but tucked into the dragster’s slipstream.