Nathan Rennie was born on May 31, 1981, in Penrith New South Wales, Australia. Nathan Rennie is famous for his professional skills in downhill mountain bike racing. Rennie has been racing bikes since he was just 15 years old. Nathan Rennie is a former Junior World Champion, and an overall UCI Elite World Cup Downhill Champion. He has been tested by The Australian Institute of Sport at 1800 watts.

In addition to biking, Nathan also practices boxing at the Five Rings Martial Arts Centre. Nathan Rennie is sponsored and has been sponsored by Santa Cruz Bicycles, Truvativ, Five-Ten, ODI grips, ITS Tires, SRAM components, Red Bull, Cytosport, Full Speed Ahead, Utopia, Troy Lee Designs, WTB, Avid, Easton Components, DT Swiss Wheels, SRAM Components, Progressive 5th Element rear shocks, Crank Bros., and Rock Shox Front Suspension. Rennie will be racing the Australian National Series this year. He is currently on the Kenda Morewood team with Mitchell Delfs.