fat bike

noun

variants or less commonly fatbike

ˈfat-ˌbīk 

plural fat bikes also fatbikes

: a bicycle with thick, soft tires that are well-suited for riding over soft surfaces (as of snow, sand, or mud)

A fat bike is defined as any bike with tires 3.8 inches wide or larger. The wider tires make it easier to ride over challenging terrain, including snow.

—Eli Francovich

Although fat bikes are thought of as winter bikes or snow bikes, some people ride them in the sand along beaches …

—Lenore Sobota

Word History

First Known Use

1982, in the meaning defined above