bicycle type Reference

Road

"Drop" handlebar,  road caliper brakes, and 700c or 650c wheel diameter with 25c or thinner tires.

Not designed for carrying loads.

Track

"Drop" handlebar,  road caliper brakes, 700c  wheel diameter with 25c or thinner tires, and one-speed or fixed gear. No derailleurs.

Not designed for carrying loads.

Speed- triathlon or time trial

Like a road bicycle, but with a specific handlebar configuration: aerobar, triathlon, or "bullhorn"

Touring

Road bicycle, except with direct-pull  brakes and  tires wider than 700x25c.

Designed for self-contained touring: carrying camping equipment or other gear.

Urban road bicycles

Road bicycle, except with disc brakes and  tires wider than 700x25c.

Road tandem

Bicycle built for two with "drop" road handlebars

Adult tricycle

Adult pedal vehicle with three wheels

 

Cruiser

Wide handlebar, wide saddle. Although equipped with fat tires similar to a mountain bicycle, cruisers are built for pavement riding only.

Hybrid or Cruiser tandem

Bicycle built for two with flat hybrid handlebars or wide tires and cruiser-type handlebars

Hybrid

"Flat" handlebar  with 700c wheels like a road bicycle.

 

City bicycle

Hybrid bicycle, except with city riding or commuting accessories such as fenders, rack, lights, or bell.

 

Cross

Road bicycle, except with cantilever or disc brakes and tires wider than 700x25c.

With a skilled rider in mind, designed for riding off pavement

Cross country mountain

"Flat" handlebar, direct pull or disc brakes, 1.9" (48mm) or wider tires, and front suspension or light-weight full suspension.

Designed for riding on rougher surfaces.

All-mountain

"Flat" handlebar, disc brakes, 1.9" (48mm) or wider tires,

Fat 1.9" (48mm) or wider tires, and medium-travel (at least 4 inches/100mm) front and rear suspension.

Designed for riding on rougher surfaces.

Freeride, downhill, or hucking

Mountain bicycle, with a heavy-duty, reinforced frame and extra-strong parts.

Designed for aggressive riding on rougher surfaces.