Definition: A 29er is mountain bike with 29 inch wheels. Standard mountain bikes have had 26 inch wheels for as long as it's mattered, but 29ers are starting to make some serious headway.
Not to be confused with a 96er ( 29 inches up front, 26 inches in the rear).
Pronunciation: twenty nine er
Also Known As: Twentyniner, Bigwheel, Twenty Nine Inch Bike
Alternate Spellings: Twentyniner
Common Misspellings: 29er, 29'er, 29"r
Examples:
I want to ride a 29er.