Shows just how safe and efficient cycling can be. In the draft of a large vehicle bicycles can easily exceed 70kph. The world record is more than 290 kph limited only by the gearing of the bicycle and held by a woman!
The things that bicycles can achieve is truly admirable.
Denise Mueller-Korenek is an American cyclist renowned for her extraordinary achievements in paced bicycle land speed racing. Born around 1973, she comes from a family with a strong daredevil streak—her father, Myron Mueller, was an ultra-distance cyclist who biked the perimeter of the contiguous United States for his 70th birthday, and her mother, Anna Dement, raced midget demolition-derby cars. This background perhaps foreshadowed her own penchant for pushing limits.
Her most notable accomplishment came on September 16, 2018, at the Bonneville Salt Flats in Utah, where she set the world record for paced bicycle land speed. Riding a custom-built carbon KHS bicycle behind a specially designed vehicle to reduce air resistance, she achieved an average speed of 183.932 miles per hour (296.009 km/h) over the final mile of a 5-mile course.
This shattered the previous record of 167 mph (269 km/h), set by Dutch cyclist Fred Rompelberg in 1995, making her not only the fastest woman but the fastest human on a bicycle. She is also the first and only woman to hold this overall world record, a title first established in 1899.
Before this, in 2016, Mueller-Korenek set the women’s paced bicycle land speed record at 147.7 mph (237.7 km/h), also at Bonneville. Her 2018 record-breaking run was a culmination of years of preparation, aided by her mentor and coach John Howard—a three-time Olympian and former speed record holder himself—and professional race car driver Shea Holbrook, who piloted the 1,000-horsepower dragster that towed her up to speed before she pedaled solo in its slipstream.
Beyond these headline feats, Mueller-Korenek’s athletic resume is impressive. As a junior cyclist in her teens, she won 15 national championships across road, track, and mountain biking, and secured multiple top-three finishes at world competitions. After retiring from competitive cycling at 19 in 1992 to join her family’s security business (eventually becoming president and CEO of Rancho Santa Fe Security Systems), she returned to the sport in 2009. Since then, she has completed over nine marathons on four continents—including Antarctica in 2013 and the Great Wall of China in 2017—and competed in Ironman triathlons. In 2019, she also claimed the U.S. Women’s Human Powered Bicycle Record (non-motor-paced) at 70.6 mph.
Mueller-Korenek’s journey reflects a blend of raw talent, relentless determination, and a willingness to embrace extreme challenges, cementing her legacy as a pioneering figure in cycling history.