Bike Bits Bike Speak Cycle & Components Technique & Racing

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Cycle and Components

A

ahead set - a type of headset that fits on a non-threaded steerer

aero levers - road bike brake levers using hidden cables that travel out the back of the level body and under the handlebar tape

all-terrain bike (ATB) - term sometimes used for a mountain bike

adjustable cup - the left-hand cup in a non-sealed bottom bracket, used in adjusting the bottom bracket bearings

B

Bar Ends - mini handlebar add-ons that fit on the ends of mountain bike bars to add another riding position

Binder Bolt - the bolt used to fasten a stem inside a steerer tube or a seatpost inside a seat tube or a handlebar inside a stem

Bottom Bracket - the cylindrical part of a bike frame that holds the crank axle, two sets of ball bearings, a fixed cup, and an adjustable cup.

Brake Pad (block) - the block of rubberlike material which presses against the wheel rim when the brakes are applied

Brake Shoe - the metal part that holds a brake pad.

Braze-Ons - parts for mounting shift levers, derailleurs, water bottle cages, and racks, which are fastened to a steel bicycle frame through a type of soldering process known as brazing.

Brinelled - a type of wear in bearing components that is a series of dents in the races or cups

Bushing - a sleeve that fits between two parts to act as a bearing; often found in suspension systems

Butted Tubing - tubing whose outside diameter remains constant but whose thickness is reduced in midsection where less strength is needed

C

cable end (cap) - a small aluminum or plastic cap installed to the ends of brake and shift cables to keep them from fraying

cage - on a front derailleur, a pair of parallel plates that push the chain from side to side; on a rear derailleur, a set of plates in which pulleys are mounted to hold and guide the chain from cog to cog

calipers - brake arms that reach around the sides of a wheel to press brake pads against the wheel rim

cantilever brakes - rim brakes with pivoting arms mounted on fork blades or seatstays

cassette - the set of gear cogs on the rear hub. Also called a freewheel, cluster or block.

cassette hub - a type of rear hub that has a built-in freewheel mechanism

chainring - a sprocket attached to the right crankarm to drive the chain

chainring nut spanner - a special tool used to loosen the slotted chainring bolts that fasten a chainring to a crankarm

chainstays - the two tubes of a bicycle frame that run from the bottom bracket back to the rear dropouts

chainsuck - when the chain doubles back on itself in the middle of a gear shift and gets jammed either between chainrings or between the inner chainring and the frame.

chain whip - a tool consisting of a metal bar and two sections of chain, used in changing cogs on a cassette

chrome moly, chromo, (chrome molybdenum) - a type of high-quality steel tubing

clincher tyre (also known as "wired-on" tyre) - a tyre whose edges hook under the curved-in edge of a rim

clipless pedals - pedals that use a releasable mechanism like that of a ski binding to lock onto cleated shoes

cleat - a metal or plastic fitting on the sole of a cycling shoe that engages the pedal.

clinchers - conventional tyres with a separate inner tube.

coaster brake - a foot-operated brake built into the rear hub normally found on one-speed kids’ bikes and cruisers

cog - a sprocket attached directly to the rear hub on a single-speed bike and mounted on a cassette on a multi-speed bike

cone - a bearing race that curves to the inside of a circle of ball bearings and works in conjunction with a cup

cottered crank - a crankset in which the crankarms are fastened to the axle by means of threaded cotters and nuts

cotterless crank - a crankset in which the crankarms are fastened to the axle by means of a taper and nuts or bolts

crankarm - a part, one end of which is attached to the bottom bracket axle and the other holds a pedal, whose forward rotation provides the leverage needed to power the bicycle

crankarm bolt - the bolt that holds a crankarm on the end of the axle in a cotterless crankset

crankset - includes the bottom bracket, two crankarms, and one or more chainrings

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