They're usually in the 21-23 mm wide range.
Cycle races take place inside a stadium called a 'velodrome'.
Thin wheels alone isn't enough to identify the bike type. Can be a road bike, bike, a track bike, a TT bike. Even fixies and single-speeds can have thin wheels.
Korakuen Velodrome ended in 1972.
Korakuen Velodrome was created in 1949.
Manchester Velodrome was created in 1994.
Usually, outdoors on public road on a Sunday morning, or indoors on a purposely built velodrome cycle track.
Cyclists in a velodrome race anticlockwise.
Neo Phaliron Velodrome was created in 1896.
Athens Olympic Velodrome was created in 1991.
Cycling is what takes place in the Velodrome, from the keiren event to team cycling events. The Velodrome is the home of cycling.
Tri cycle
One