Longest 180 flip on a bicycle

According to Official Guinness Records,

The longest 180? on a mountain bike measured 3 m (10 ft) by Jim Dechamp (USA) at Miller Motorsports Park in Tooele, Utah, USA, on 18 November 2008 for the MTV show 'Nitro Circus'.
The GWR episode will air January 2009.

For a complete list of 2008 records, please visit 2008 Guinness Records in United States.

Other United States records that might interest you:

• Most motorcycle backflips in 30 seconds
• Longest motorcycle front flip
• Fastest towed trash can
• Lowest motorcycle backflip
• Longest tandem motorcycle backflip
• First female four-star general
• Largest rubber band ball
• Fastest Time to throw 10 knives alternatively to both sides of a human target