Its expensive, dangerous and difficult, and putting herself in position to have a chance at pulling it off has taken four years of her life.So why would Denise Mueller -- 43-year-old mother of three, business owner and elite athlete from Carlsbad, California -- want to invest so much of herself to go faster than anyone ever has on a bicycle?I have been asked that by a couple of people over the years, and the first and easy answer is, why not, right? Mueller said, laughing. But really, how many chances do you get to be the first person ever to be able to do something as a female? Men have done this record since 1899, and a woman has never even tried to do this record. So, why not? I get to be the first ever.From Saturday to Tuesday on the Bonneville Salt Flats in Utah, Mueller will attempt to break the world record -- 167 mph -- for the fastest speed on a paced bicycle. She has a partner in the endeavor: Sports car racer Shea Holbrook will pace Mueller in the worlds fastest production SUV, a $112,000 Range Rover Sport SVR.Mueller will be towed on her bike to 90 mph and released. Then shes on her own to gain speed while staying only 2 to 3 feet off the rear bumper of the Range Rover, tucked within a tail fairing (it looks like a three-sided box) that creates an aerodynamic vortex.Shell be able to make repeated runs on a 5-mile-long stretch of compacted table salt. Neither the cyclist nor the driver can make a mistake.The importance of my job is to keep Denise alive, honestly, Holbrook said. Everything that I have been taught, I have to reverse because we are going to be accelerating at a slow rate of speed. Im used to fast inputs, fast thinking, fast reaction; whereas, with this, its still fast thinking, but at a slower pace.The land-speed record for paced bicycles is an odd one because it has been set only 10 times over three centuries. It was thought up, according to Muellers The Project Speed website, by Charles Mile-A-Minute Murphy, who drafted behind a train to set a 60 mph record at the end of the 19th century. The current record was set in 1995 by Dutch cyclist Fred Rompelberg, who drafted behind a converted 1,000-horsepower dragster.Muellers bid, though, is not all or nothing. Shell set a womens record if she makes a successful attempt. Even if she doesnt break the record, she would still set the cycling world on its ear if she beat the 152.2 mph mark set in 1985 by American Joh