### vehicle | bicycle:

Bicycle racing
* is an inherently dangerous activity that can result in serious injury or death
  - the second most popular spectator sport in the world, behind only soccer
* means any contest of speed or competition where bicycles are used.

Bicycle theft
* crime that causes finiancial loss and inconvenience for the community.
* is one of the more common crimes which occur on campus every year.

Electric bicycle
* are light and go fairly slowly, so regenerative brakes achieve little
  - the first affordable electric vehicles
* can go farther and faster than conventional bicycles.
* decentralize power away from corporations and toward individuals.
* have small electric motors that assist pedaling by the rider.

Mountain bicycle
* Most mountain bicycles have tires.
* are a human scale, minimal impact, sustainable form of off-road recreation.
* can also snag weeds.
* have sturdier frames, more upright handlebars and wider tires with heavy tread

### vehicle | bicycle:

Mountain bike
* Many mountain bikes have suspension systems to cushion the rider from bumps on trails.
* Most mountain bikes feature sloping top tubes for more stand-over clearance
  - have wheels
* Some mountain bikes have suspension for increased shock absorption.
* are able to bridge the gap between automobiles and foot patrol
  - also easier to get used to for new riders
  - better equipped to handle rough terrain
  - by far the most popular types of snow bikes
  - designed for all types of terrain, from flat gravel paths to steep rocky trails
  - low impact, environmentally safe, and respectful of both hikers and nature
  - slower than a road bike, and there is less wind-chill at a slower speed
  - sturdier than road bikes
  - useful, as they are ideal for covering rough terrain
* come in a wide range of sizes and styles.
* concentrate weight in a small area, quickly wearing grooves into the ground.
* don t like water.
* have shocks that take the place of the front fork
  - special tires for rougher terrain
* intended for off-road biking are typically lighter and have better amenities.
* tend to have adequate ground clearance, although most, alas, have vertical dropouts.

### vehicle:

Bike
* Most bikes have brakes
  - disc brakes
  - wheels
* Most bikes use bags
  - handlebar bags
  - sealed caged ball bearings
* Some bikes have attitudes, often due to bad parenting
  - charging systems that chronicaly over charge the battery
  - tall windshields
  - use friction
* are O.K., also dogs on leash
  - a commodity that has wheels
* are capable of crashs
  - skids
  - everywhere, being ridden by virtually everyone, regardless of sex, age, or size
* are located in garages
  - streets
  - toy stores
  - much more energy efficient and environmentally friendly than cars
* are used for commuting
  - riding
  - transport
  - vehicles, just like cars and trucks
* are, in fact, the world's most popular transportation tool.
* come in a staggering array of shapes, sizes and colors.
* have bars
  - functions
  - gears, just like cars
* includes axles
  - bases
* includes bicycle seats
  - coaster brakes
  - fulcrums
  - pedals
  - sections
  - spokes
  - sprocket wheels
* reach areas
  - congest areas
* riding on narrow, natural surface trails is as old as the bicycle.
  - tubes
* walking and other non-motorized forms of transportation are the way of the future.

### vehicle | bike:

Bike theft
* crime of opportunity.
* is classified legally as theft
  - common in some communities
  - somewhat of a major socio-economic problem

Electric bike
* All electric bikes allow pedaling and many require pedaling.
* are immune to traffic jams
  - just regular bikes with an electric motor on the back wheel
  - simple to maintain and repair

Recumbent bike
* allow one to pedal while leaning back with one's feet out in front.
* have seats which look like a chair and allow the user to lean back with support.