Axle:  The shaft on which the wheel revolves.

Berm:  A corner on a track built up on the outside of a turn to create a banked curve.

BMX:  Abbreviation for bicycle motocross.

Bottom Bracket:  The mechanism at the bottom of the bicycle frame, which holds the spindle and crank.

Brakes:  Any bicycle braking system which works by opening and closing two brake shoes on the rim in a
clamping motion, like jaws.

Brake Lever:  A lever mounted on the handlebar used for activating the brake.

Cables:  Steel wires braided into cables and sometimes covered with plastic coating.  Cables are used to connect
the brake levers to the brakes.Bike Parts Chart

Case:  Coming up short on a jump & the back wheel of the bike hits
the peak of the landing.

Chain Stay:  The part of the bicycle frame that runs parallel to the
chain.  It connects the bottom bracket to the rear dropouts.

Chain Wheel:  A one-piece front gear.  The chain wheel is attached
to the bottom bracket and crank.

Clipless Pedals:  Hook or “clip” to your clip less shoes.  Some clipless
pedals have a cage around the outside of the pedals.

Crank:  The L-shaped metal arm to which the pedals are attached.

Cruiser:  A Bicycle with 24 ” wheel diameter.

Down Tube:  Part of the bicycle frame, which slants downward at
an angle.  It runs from the head tube to the bottom bracket.

DNS:  Designation on a moto sheet that a rider “Did Not Start” in any particular race.

Dropouts:  Small, slotted openings, which hold the front and rear wheel axles.

Entry Fee:  Paid to register for any sanctioned event.

Expert:  Highest level of amateur competition.

Fork:  The double-pronged section of the frame, which holds the front wheel in place.

Freewheel:  A one-piece rear gear that allows the rider to back-pedal.  Bearings are built in.

Gear Ratio:  A number, which indicates the relationship between the two gears and tells you how much work a
particular combination of gears will do.

Grips:  Rubber or Plastic cover who goes on the handle bars at the end to aid in grip.

Headset:  Bearing set for which your front end rotates on and your fork/handle bars slide into.

Head Tube:  A short vertical tube at the very front of the bike.  The front fork fits inside the head tube.

Hole Shot:  Taking the lead position out of the starting gate and going into the first turn.

Hub:  Cylinder, which holds the axle of each wheel.

Intermediate: Skill level for riders with limited experience and ability.

Lane:  Position 1 thru 8 on the starting gate.

Main Event:  Final class race, after all qualifying has taken place, to determine class placing.

Manual:  The act of riding a wheelie without pedaling typically over the top section of various jumps.

Moto:  a.) A single racing heat. b.) Any riders specific race.

Moto Board:  An area where the moto sheets are posted before and during the race.

Moto Number:  Number corresponding with any specific race (moto).

Moto Sheet:  Paperwork displaying the races in moto number order.

Novice:  New rider to the sport.

Number Plate:  Displays riders earned or temporary number for identification purposes

Platform Pedals:  Are the most commonly used pedals for trails, street, and ramps. They have a platform that
your foot rests on with little pegs that stick to your shoe.

Rhythm Section:  A series of jumps or rollers back to back on a track that pose as an obstacle.

Rims:  Round part of the wheel that the tires attach onto.

Registration:  Where you go to sign up to compete in a race (moto)

Roller:  An obstacle on a track that is rolled over as opposed to being jumped.

Sandbagging: Intentionally allowing other rider(s) to pass during a main event or within any round of a total
points race so as not to gain wins towards classification advancement.

Seat Stays:  Section of the frame, which runs from the seat tube to the rear wheel dropouts.

Seatpost: The tube, which holds the seat and goes into the frame.

Staging Area:  The area where the riders gather for loading into the gate.

Starting Gate:  Flat formed area with a hinged portion. This is where each race commences.

Stem:  The part connected to the forks that hold the handlebars.  Sometimes referred to as a gooseneck.

Step-Up:  A jump in which the landing is elevated above the launch.

Sprocket:  Same as a chain wheel or either the front or rear gear assembly.  Sprockets are strong. They are a
combination of a chain ring and a spider together

Table Top:  A jump on a track that is completely level or flat all the way across it from the lip to the landing.

Top Tube:  The top horizontal tube on a bicycle frame, between your head tube and seat tube.

Track Director or T.D.:  a person who runs and maintains all aspects of a BMX track. Does all this for no pay to
help the kids and parents who love BMX. Thanks to all track operators in BMX!

Volunteer:  A VERY special person who voluntarily undertakes or expresses a willingness to undertake help for
the track and riders for no pay or free merchandise.


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