Anatomy of a Bike

Anatomy of a Bike

7300RED

1	saddle
2	saddle rails (saddle can be slid forward or backward along these)
3	seatpost (holds saddle and determines its tilt)
4	seatpost binder (a quick-release here allows saddle to be raised or lowered without tools)
5	seat tube (length determines frame size)
6	rear brake
7	seatstay
8	freewheel or cassette (collection of five to nine cogs of varied number of teeth)
9	rear dropout (slots in which rear hub axle fits)
10	cable housing (routes and protects wire cable)
11	derailleur adjustment barrel (allows fine-tuning of cable length; similar mechanism may be found on brakes)
12	rear derailleur (moves chain from cog to cog; controlled by right shift lever)
13	derailleur pulleys (direct chain through rear derailleur)
14	cable stop (anchors the housing for the cable to pull against)
15	front derailleur (moves chain from chainring to chainring; controlled by left shift lever)
16	pedal (flat pedals accept toeclips and straps; clipless pedals also available) chainring
17	crankarm
18	chainring
19	handlebar
20	stem (available in various heights, lengths, and rises to fine-tune fit)
21	headset (attaches fork to frame; rotates for steering)
22	top tube (length influences riding position)
23	shift lever (twist-shift; trigger shifters also available)
24	brake lever
25	shift cable
26	brake cable
27	head tube (houses fork steerer tube and headset cups)
28	fork crown
29	front brake
30	tire (less aggressive tread design than mountain bike tires for lower rolling resistance)
31	spok
32	rim
33	fork blades (rigid or suspension)
34	quick-release hub (allows wheel removal without tools)
35	down tube
36	cage braze-ons (hold bottle cage)
37	chainstay
38	chain

brakeset
(encompassing term for levers, cables, and calipers)

wheel
(encompassing term for assembled rim, spokes, and hub, with or without rim strip, tube, and tire)

crankset
(encompassing term for crankarms, chainrings, and bottom bracket)

drivetrain
(encompassing term for crankset, chain, cassette or freewheel, and derailleurs)

bottom bracket
(houses bearings and cups or retainer rings and axle that connect crankarms)

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